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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | $ 0 | $ 0 |
Current Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |
Federal | 77,422,000 | 73,921,000 | $ 63,496,000
Current State and Local Tax Expense (Benefit) | 4,538,000 | 4,822,000 | 860,000
Total current tax expense (benefit) | 81,960,000 | 78,743,000 | 64,356,000
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] |  |  |
Federal | 12,446,000 | 10,162,000 | 26,339,000
State | 2,250,000 | 1,603,000 | 1,826,000
Total deferred tax expense (benefit) | 14,696,000 | 11,765,000 | 59,651,000
Income tax expense (benefit) | $ 96,656,000 | $ 90,508,000 | $ 124,007,000
Federal income tax statutory rate | 21.00% | 35.00% | 35.00%
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income tax expense (benefit) at statutory rate | $ 104,483,000 | $ 94,489,000 | $ 104,295,000
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount | 5,363,000 | 5,076,000 | 1,746,000
Tax-exempt securities | 11,078,000 | 7,222,000 | 5,666,000
Federal tax credits | (1,704,000) | (845,000) | (434,000)
Bank owned life insurance | (3,646,000) | (2,764,000) | (2,778,000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Amount | (238,000) | (112,000) | (283,000)
Revaluation of deferred taxes | 0 | 0 | (31,486,000)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount | (1,011,000) | (2,966,000) | (5,366,000)
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount | 4,487,000 | 4,852,000 | 1,007,000
Income tax expense (benefit) | 96,656,000 | 90,508,000 | 124,007,000
Deferred Tax Assets, Net [Abstract] |  |  |
Loan loss allowance | 23,051,000 | 20,449,000 |
Loans | 20,808,000 | 29,453,000 |
Insurance | 673,000 | 1,955,000 |
Accrued liability for supplemental retirement agreements | 7,308,000 | 6,231,000 |
Restricted stock and stock options | 10,515,000 | 9,026,000 |
Securities | 0 | 15,974,000 |
Cash flow hedge | 1,373,000 | 459,000 |
Equity Method Investments | 425,000 | 602,000 |
Leases | 22,782,000 | 2,099,000 |
Other real estate owned | 691,000 | 1,158,000 |
Net federal operating loss carryforward and credits | 5,954,000 | 13,754,000 |
Annual Incentive Compensation | 12,626,000 | 9,996,000 |
Other deferred tax assets | 1,810,000 | 3,343,000 |
Total deferred tax assets | 108,016,000 | 114,499,000 |
Deferred Tax Liabilities, Net [Abstract] |  |  |
Depreciation and amortization | 12,455,000 | 11,769,000 |
Core deposit and other intangible assets | 13,253,000 | 11,475,000 |
Securities | 6,978,000 | 0 |
REIT dividends | 1,650,000 | 1,589,000 |
FHLB related liabilities | 925,000 | 925,000 |
Right-of-use assets and other leasing transactions | 21,169,000 | 639,000 |
Subordinated debt | 2,050,000 | 1,134,000 |
Partnership interests | 3,534,000 | 459,000 |
Other deferred tax liabilities | 1,875,000 | 1,758,000 |
Total deferred tax liabilities | 63,889,000 | 29,748,000 |
Net deferred tax assets | 44,127,000 | 84,751,000 |
Unrecognized tax benefits, beginning of period | 5,083,000 | 2,838,000 | 1,274,000
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions | 1,827,000 | 2,245,000 | 1,564,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions | 0 | 0 | 0
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations | 0 | 0 | 0
Unrecognized Tax Benefits, Increase Resulting from Settlements with Taxing Authorities | 0 | 0 | 0
Unrecognized tax benefits, end of period | $ 6,910,000 | $ 5,083,000 | $ 2,838,000

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