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Condensed Parent Company Statements - Condensed Cash Flow Statement (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Prepaid expenses and other assets | $ 17,163 | $ 1,336 | $ (3,002) |
Accounts Payable and Other Accrued Liabilities | 29,783 | 24,904 |  |
Net cash provided by operating activities | 46,048 | 86,419 | 94,195 |
Net cash provided by investing activities | (131,346) | (295,149) | (381,323) |
Proceeds from issuance of subordinated notes | 73,513 | 0 | 0 |
Net cash used in financing activities | 428,872 | 226,143 | 247,617 |
Parent Company [Member] |  |  |  |
Condensed Cash Flow Statements, Captions [Line Items] |  |  |  |
Net income | 59,313 | 73,612 | 67,109 |
Equity in undistributed earnings of subsidiary | (27,164) | (47,695) | (38,748) |
Compensation expense for stock option grants | 1,153 | 922 | 737 |
Amortization of interest rate derivative and deferred costs on subordinated notes | 608 | 434 | 154 |
Loss on other investments |  | 23 |  |
Prepaid expenses and other assets | (15) | (3) | 13 |
Accounts Payable and Other Accrued Liabilities | 31 | 226 | 182 |
Income taxes | (46) | 300 | (278) |
Net cash provided by operating activities | 33,880 | 27,819 | 29,169 |
Return of principal - other investments |  | 2 |  |
Net cash provided by investing activities |  | 2 |  |
Purchases of the Company's common stock | (22,104) | (849) | (903) |
Proceeds from issuance of subordinated notes | 73,513 |  |  |
Dividends paid | (33,426) | (29,052) | (15,819) |
Stock options exercised | 661 | 4,158 | 2,224 |
Net cash used in financing activities | 18,644 | (25,743) | (14,498) |
Increase in Cash | 52,524 | 2,078 | 14,671 |
Cash, Beginning of Year |  | 58,726 | 56,648 | $ 41,977
Cash, End of Year | 111,250 | 58,726 | 56,648 |
Interest paid | $ 7,349 | $ 5,424 | $ 5,001 |

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