FAIR VALUES OF ASSETS AND LIABILITIES - Recurring Basis (Details) - USD ($)
$ in Thousands |
Mar. 31, 2018 |
Dec. 31, 2017 |
| Assets measured at fair value on a recurring basis |
|
|
| Loans Held-for-sale, Fair Value Disclosure |
$ 426,000
|
$ 413,000
|
| Consumer loans |
86,000
|
93,000
|
| Trading account securities |
85,000
|
86,000
|
| Available-for-sale securities |
14,607,000
|
14,869,000
|
| Other Securities, Fair Value |
602,000
|
600,000
|
| Gross amounts of recognized assets |
356,000
|
322,000
|
| Derivative assets netting |
(269,000)
|
(190,000)
|
| Net amounts of assets presented in the condensed consolidated balance sheets |
87,000
|
132,000
|
| Liabilities measured at fair value on a recurring basis |
|
|
| Gross amounts of recognized liabilities |
439,000
|
331,000
|
| Gross amounts offset in the condensed consolidated balance sheets |
(282,000)
|
(245,000)
|
| Derivative liabilities |
157,000
|
86,000
|
| U.S. Treasury |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
5,000
|
5,000
|
| Federal agencies, Other agencies |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
187,000
|
70,000
|
| Municipal securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
3,834,000
|
3,878,000
|
| Asset-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
427,000
|
467,000
|
| Corporate debt |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
102,000
|
109,000
|
| Residential Mortgage Backed Securities [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
724,000
|
1,367,000
|
| Commercial Mortgage Backed Securities [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
1,791,000
|
2,487,000
|
| Fair Value, Measurements, Recurring |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Loans Held-for-sale, Fair Value Disclosure |
426,000
|
413,000
|
| Trading account securities |
85,000
|
86,000
|
| Available-for-sale securities |
14,607,000
|
14,869,000
|
| Other Securities, Fair Value |
21,000
|
19,000
|
| MSRs |
12,000
|
11,000
|
| Derivative assets netting |
(269,000)
|
(190,000)
|
| Net amounts of assets presented in the condensed consolidated balance sheets |
87,000
|
132,000
|
| Liabilities measured at fair value on a recurring basis |
|
|
| Gross amounts offset in the condensed consolidated balance sheets |
(282,000)
|
(245,000)
|
| Derivative liabilities |
157,000
|
86,000
|
| Short-term borrowings |
1,000
|
|
| Fair Value, Measurements, Recurring | U.S. Treasury |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
5,000
|
5,000
|
| Fair Value, Measurements, Recurring | Federal agencies: Mortgage-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
7,531,000
|
6,484,000
|
| Fair Value, Measurements, Recurring | Federal agencies, Other agencies |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
187,000
|
70,000
|
| Fair Value, Measurements, Recurring | Municipal securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
2,000
|
|
| Available-for-sale securities |
3,834,000
|
3,878,000
|
| Fair Value, Measurements, Recurring | Asset-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
427,000
|
467,000
|
| Fair Value, Measurements, Recurring | Corporate debt |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
102,000
|
109,000
|
| Fair Value, Measurements, Recurring | Other Debt Obligations [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
83,000
|
86,000
|
| Available-for-sale securities |
6,000
|
2,000
|
| Fair Value, Measurements, Recurring | Residential Mortgage Backed Securities [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
724,000
|
1,367,000
|
| Fair Value, Measurements, Recurring | Commercial Mortgage Backed Securities [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
1,791,000
|
2,487,000
|
| Fair Value, Measurements, Recurring | Level 1 |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Loans Held-for-sale, Fair Value Disclosure |
0
|
0
|
| Consumer loans |
0
|
0
|
| Trading account securities |
82,000
|
83,000
|
| Available-for-sale securities |
5,000
|
5,000
|
| Other Securities, Fair Value |
21,000
|
19,000
|
| MSRs |
0
|
0
|
| Gross amounts of recognized assets |
0
|
0
|
| Liabilities measured at fair value on a recurring basis |
|
|
| Gross amounts of recognized liabilities |
0
|
0
|
| Short-term borrowings |
1,000
|
|
| Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
5,000
|
5,000
|
| Fair Value, Measurements, Recurring | Level 1 | Federal agencies: Mortgage-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Federal agencies, Other agencies |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Municipal securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
0
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Asset-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Corporate debt |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Other Debt Obligations [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
82,000
|
83,000
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 2 |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Loans Held-for-sale, Fair Value Disclosure |
426,000
|
413,000
|
| Consumer loans |
49,000
|
55,000
|
| Trading account securities |
3,000
|
3,000
|
| Available-for-sale securities |
11,372,000
|
11,673,000
|
| MSRs |
0
|
0
|
| Gross amounts of recognized assets |
350,000
|
316,000
|
| Liabilities measured at fair value on a recurring basis |
|
|
| Gross amounts of recognized liabilities |
433,000
|
326,000
|
| Short-term borrowings |
0
|
|
| Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 2 | Federal agencies: Mortgage-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
7,531,000
|
6,484,000
|
| Fair Value, Measurements, Recurring | Level 2 | Federal agencies, Other agencies |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
187,000
|
70,000
|
| Fair Value, Measurements, Recurring | Level 2 | Municipal securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
2,000
|
|
| Available-for-sale securities |
604,000
|
711,000
|
| Fair Value, Measurements, Recurring | Level 2 | Asset-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
427,000
|
443,000
|
| Fair Value, Measurements, Recurring | Level 2 | Corporate debt |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
102,000
|
109,000
|
| Fair Value, Measurements, Recurring | Level 2 | Other Debt Obligations [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
1,000
|
3,000
|
| Available-for-sale securities |
6,000
|
2,000
|
| Fair Value, Measurements, Recurring | Level 2 | Residential Mortgage Backed Securities [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
724,000
|
1,367,000
|
| Fair Value, Measurements, Recurring | Level 2 | Commercial Mortgage Backed Securities [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
1,791,000
|
2,487,000
|
| Fair Value, Measurements, Recurring | Level 3 |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Loans Held-for-sale, Fair Value Disclosure |
0
|
0
|
| Consumer loans |
37,000
|
38,000
|
| Trading account securities |
0
|
0
|
| Available-for-sale securities |
3,230,000
|
3,191,000
|
| MSRs |
12,000
|
11,000
|
| Gross amounts of recognized assets |
6,000
|
6,000
|
| Liabilities measured at fair value on a recurring basis |
|
|
| Gross amounts of recognized liabilities |
6,000
|
5,000
|
| Short-term borrowings |
0
|
|
| Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Federal agencies: Mortgage-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Federal agencies, Other agencies |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Municipal securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
0
|
|
| Available-for-sale securities |
3,230,000
|
3,167,000
|
| Fair Value, Measurements, Recurring | Level 3 | Asset-backed securities |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
24,000
|
| Fair Value, Measurements, Recurring | Level 3 | Corporate debt |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Available-for-sale securities |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Other Debt Obligations [Member] |
|
|
| Assets measured at fair value on a recurring basis |
|
|
| Trading account securities |
0
|
0
|
| Available-for-sale securities |
$ 0
|
$ 0
|