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Condensed Parent Company Statements - Condensed Balance Sheet (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Condensed Balance Sheet Statements, Captions [Line Items] |  |
Cash | $ 92,403 | $ 99,299
Prepaid expenses and other assets | 58,889 | 74,984
Total Assets | 5,526,420 | 5,015,072
Subordinated debentures issued to capital trust | 148,397 | 74,276
Subordinated notes | 148,397 | 74,276
Additional paid-in capital | 35,004 | 33,510
Retained earnings | 541,448 | 537,167
Accumulated other comprehensive income | 53,151 | 32,246
Parent Company [Member] |  |
Condensed Balance Sheet Statements, Captions [Line Items] |  |
Cash | 111,250 | 58,726
Investment in subsidiary bank | 698,398 | 650,329
Deferred and accrued income taxes | 157 | 111
Prepaid expenses and other assets | 883 | 868
Total Assets | 810,688 | 710,034
Accounts payable and accrued expenses | 6,776 | 6,918
Subordinated debentures issued to capital trust | 25,774 | 25,774
Subordinated notes | 148,397 | 74,276
Common Stock | 138 | 143
Additional paid-in capital | 35,004 | 33,510
Retained earnings | 541,448 | 537,167
Accumulated other comprehensive income | 53,151 | 32,246
Total Assets and Liabilities | $ 810,688 | $ 710,034

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