QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Interest income | $ 894,000 | $ 873,000 | $ 846,000 | $ 820,000 | $ 815,000 | $ 694,000 | $ 566,000 | $ 557,000 | $ 3,433,000 | $ 2,632,000 | $ 2,115,000 |
| Interest expense | 124,000 | 115,000 | 101,000 | 91,000 | 80,000 | 69,000 | 60,000 | 54,000 | 431,000 | 263,000 | 164,000 |
| Net interest income | 770,000 | 758,000 | 745,000 | 729,000 | 735,000 | 625,000 | 506,000 | 503,000 | 3,002,000 | 2,369,000 | 1,951,000 |
| Provision for credit losses | 65,000 | 43,000 | 25,000 | 68,000 | 75,000 | 63,000 | 25,000 | 28,000 | 201,000 | 191,000 | 100,000 |
| Noninterest income | 340,000 | 330,000 | 325,000 | 312,000 | 334,000 | 303,000 | 271,000 | 242,000 | 1,307,000 | 1,150,000 | 1,039,000 |
| Noninterest expense | 633,000 | 680,000 | 694,000 | 707,000 | 681,000 | 713,000 | 523,000 | 491,000 | 2,714,000 | 2,408,000 | 1,976,000 |
| Income before income taxes | 412,000 | 365,000 | 351,000 | 266,000 | 313,000 | 152,000 | 229,000 | 226,000 | 1,394,000 | 920,000 | 914,000 |
| Provision for income taxes | (20,000) | 90,000 | 79,000 | 59,000 | 74,000 | 25,000 | 54,000 | 55,000 | 208,000 | 208,000 | 221,000 |
| Net income | 432,000 | 275,000 | 272,000 | 207,000 | 239,000 | 127,000 | 175,000 | 171,000 | 1,186,000 | 712,000 | 693,000 |
| Dividends on preferred shares | 19,000 | 19,000 | 19,000 | 19,000 | 19,000 | 18,000 | 20,000 | 8,000 | 76,000 | 65,000 | 32,000 |
| Net income available to common shareholders | $ 413,000 | $ 256,000 | $ 253,000 | $ 188,000 | $ 220,000 | $ 109,000 | $ 155,000 | $ 163,000 | $ 1,110,000 | $ 647,000 | $ 661,000 |
| Basic earnings per common share (in USD per share) | $ 0.38 | $ 0.24 | $ 0.23 | $ 0.17 | $ 0.20 | $ 0.12 | $ 0.19 | $ 0.21 | $ 1.02 | $ 0.72 | $ 0.82 |
| Diluted earnings per common share (in USD per share) | $ 0.37 | $ 0.23 | $ 0.23 | $ 0.17 | $ 0.20 | $ 0.11 | $ 0.19 | $ 0.20 | $ 1.00 | $ 0.70 | $ 0.81 |
| X | ||||||||||
- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Total aggregate amount of all noninterest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of expense related to estimated loss from loan and lease transactions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|