Quarterly report pursuant to Section 13 or 15(d)

Other Comprehensive Income (Activity/Rollforward) (Details)

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Other Comprehensive Income (Activity/Rollforward) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Pretax        
Total other comprehensive income (loss), pretax $ 65,056 $ (190,920) $ 84,188 $ (204,924)
Tax (Expense) Benefit        
Total other comprehensive income (loss), tax (expense) benefit (23,036) 67,139 (29,906) 72,005
After-tax        
Transisition obligation 809 3,945 5,598 7,754
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 23,448 (76,664) 30,401 (81,989)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, after tax 17,186 (56,410) 17,129 (69,380)
Change in pension and post-retirement benefit plan assets and liabilities, after-tax 577 5,348 1,154 10,696
Total other comprehensive income (loss) 42,020 (123,781) 54,282 (132,919)
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (214,009) (150,817)
Period change     54,282 (132,919)
OCI before reclassifications     65,714 (138,896)
Amounts reclassified from accumulated OCI     (11,432) 5,977
Ending Balance (159,727) (283,736) (159,727) (283,736)
Unrealized gains and losses on debt securities [Member]
        
Pretax        
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, before-tax 1,252 6,102 8,660 11,996
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, pretax 36,437 (119,321) 62,682 (128,019)
Less: Reclassification adjustment for net losses (gains) losses included in net income, pretax (284) 926 (15,659) 1,231
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, pretax 37,405 (112,293) 55,683 (114,792)
Tax (Expense) Benefit        
Non-credit-related impairment losses (recoveries) on debt (equity) securities not expected to be sold, tax (expense) benefit (443) (2,157) (3,062) (4,242)
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, tax (expense) benefit (13,015) 42,105 (22,347) 45,138
Less: Reclassification adjustment for net losses (gains) losses included in net income, tax (expense) benefit 100 (327) 5,481 (435)
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, tax (expense) benefit (13,358) 39,621 19,928 (40,461)
After-tax        
Transisition obligation 809 3,945 5,598 7,754
Unrealized holding gains (losses) on debt (equity) securities available for sale arising during the period, after-tax 23,422 (77,216) 40,335 (82,881)
Less: Reclassification adjustment for net losses (gains) losses included in net income, after-tax (184) 599 (10,178) 796
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 24,047 (72,672) 35,755 (74,331)
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (39,234) 38,304
Period change     35,755 (74,331)
OCI before reclassifications     45,933  
Amounts reclassified from accumulated OCI     (10,178) 796
Ending Balance (3,479) (36,027) (3,479) (36,027)
Unrealized gains and losses on equity securities [Member]
        
Pretax        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, pretax 323 (68) 376 152
Tax (Expense) Benefit        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale, tax (expense) benefit (113) 21 132 56
After-tax        
Net change in unrealized holding gains (losses) on debt (equity) securities available for sale 210 (47) 244 96
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     292 194
Period change     244 96
OCI before reclassifications     244 96
Amounts reclassified from accumulated OCI     0 0
Ending Balance 536 290 536 290
Unrealized gains and losses on cash flow hedging derivatives [Member]
        
Pretax        
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, pretax 27,253 (82,327) 30,058 (98,254)
Less: Reclassification adjustment for net losses (gains) losses included in net income, pretax (813) (4,459) (3,705) (8,485)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, pretax 26,440 (86,786) 26,353 (106,739)
Tax (Expense) Benefit        
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, tax (expense) benefit (9,539) 28,815 (10,521) 34,389
Less: Reclassification adjustment for net losses (gains) losses included in net income, tax (expense) benefit 285 1,561 1,297 2,970
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships (9,254) 30,376 (9,224) 37,359
After-tax        
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period, after-tax 17,714 (53,512) 19,537 (63,865)
Less: Reclassification adjustment for net losses (gains) losses included in net income, after-tax (528) (2,898) (2,408) (5,515)
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships, after tax 17,186 (56,410) 17,129 (69,380)
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (18,844) 47,084
Period change     17,129 (69,380)
OCI before reclassifications     19,537 (63,865)
Amounts reclassified from accumulated OCI     (2,408) (5,515)
Ending Balance (1,715) (22,296) (1,715) (22,296)
Accumulated Unrealized Losses for Pension and Other Post-retirement obligations [Member]
        
Pretax        
Re-measurement obligation, pre-tax 0   0  
Defined benefit pension items, pre-tax 888   1,776  
Amortization of net actuarial loss and prior service cost included in income, pretax   8,227    
Curtailment 0 0    
Change in pension and post-retirement benefit plan assets and liabilities, pretax 888   1,776  
Tax (Expense) Benefit        
Re-measurement obligation, tax (expense) benefit 0   0  
Defined benefit pension items, tax (expense) benefit (311)   (622)  
Amortization of net actuarial loss and prior service cost included in income, tax (expense) benefit   (2,879)    
Change in pension and post-retirement benefit plan assets and liabilities, tax (expense) benefit (311)   (622)  
After-tax        
Re-measurement obligation, after tax 0   0  
Amortization of net actuarial loss and prior service cost included in income, net of tax   5,348    
Defined benefit pension items, after tax 577   1,154  
Change in pension and post-retirement benefit plan assets and liabilities, after-tax 577   1,154  
Activity in accumulated other comprehensive income, net of tax        
Beginning Balance     (156,223) (236,399)
Period change     1,154 10,696
OCI before reclassifications     0 0
Amounts reclassified from accumulated OCI     1,154 10,696
Ending Balance (155,069) (225,703) (155,069) (225,703)
Debt Securities [Member] | Unrealized gains and losses on debt securities [Member]
        
Activity in accumulated other comprehensive income, net of tax        
OCI before reclassifications       $ (75,127)