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Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2020
Significant Accounting Policies [Abstract] |
Schedule Of New Accounting Pronouncements And Changes In Accounting Principles [Text Block] |
| January 1, 2020
| Pre-Adoption |  | Impact of adoption |  | Post-Adoption |  | Cumulative Effect on Retained Earnings
| (In thousands)
Assets: |  |  |  |  |  |  |  |  |  |  |
Investment securities available for sale | $ | 1,074,169 |  | $ | - |  | $ | 1,074,169 |  | $ | -
Deferred tax asset |  | 176,740 |  |  | 13,874 |  |  | 190,614 |  |  | 13,874
Loans |  |  |  |  |  |  |  |  |  |  |
Commercial |  | 2,222,085 |  |  | 42,143 |  |  | 2,264,228 |  |  | -
Mortgage |  | 2,508,821 |  |  | 7,830 |  |  | 2,516,651 |  |  | -
Consumer |  | 504,507 |  |  | 181 |  |  | 504,688 |  |  | -
Auto |  | 1,522,973 |  |  | 368 |  |  | 1,523,341 |  |  | -
|  | 6,758,386 |  |  | 50,522 |  |  | 6,808,908 |  |  | -
Allowance for credit losses on loans |  |  |  |  |  |  |  |  |  |  |
Commercial |  | (34,886) |  |  | (45,705) |  |  | (80,591) |  |  | (3,562)
Mortgage |  | (30,382) |  |  | (18,810) |  |  | (49,192) |  |  | (10,980)
Consumer |  | (18,446) |  |  | (8,599) |  |  | (27,045) |  |  | (8,418)
Auto |  | (32,825) |  |  | (16,606) |  |  | (49,431) |  |  | (16,238)
|  | (116,539) |  |  | (89,720) |  |  | (206,259) |  |  | (39,198)
Net loans |  | 6,641,847 |  |  | (39,198) |  |  | 6,602,649 |  |  | (39,198)
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Allowance for credit losses on off-balance sheet credit exposures |  | 3,688 |  |  | 170 |  |  | 3,858 |  |  | 170
| $ | 7,889,068 |  | $ | (25,494) |  | $ | 7,863,574 |  | $ | (25,494)

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