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Parent Company Only Condensed Financial Statements - Condensed Statements of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Income [Abstract] |  |  |  |  |  |  |  |  |  |  |
Dividends from Bank |  |  |  |  |  |  |  |  | $ 895 | $ 1,055 | $ 906
Dividends from Other Subsidiaries |  |  |  |  |  |  |  |  | 1,400 | 1,500 | 1,200
Expenses: |  |  |  |  |  |  |  |  |  |  |
Interest expense-subordinated debentures and notes |  |  |  |  |  |  |  |  | 9,885 | 7,507 | 5,798
Interest expense-notes payable | $ 6,667 | $ 7,433 | $ 7,358 | $ 13,320 | $ 15,625 | $ 18,032 | $ 17,486 | $ 15,274 | 34,778 | 66,417 | 45,897
Income tax benefit | (6,508) | (4,428) | (3,656) | (2,971) | (7,246) | (7,469) | (4,479) | (4,103) | (17,563) | (23,297) | (15,360)
Net income | $ 28,931 | $ 17,951 | $ 14,634 | $ 12,868 | $ 29,090 | $ 29,069 | $ 18,424 | $ 16,156 | 74,384 | 92,739 | 89,217
Total comprehensive income |  |  |  |  |  |  |  |  | 93,755 | 119,770 | 84,587
Parent [Member] |  |  |  |  |  |  |  |  |  |  |
Operating Income [Abstract] |  |  |  |  |  |  |  |  |  |  |
Dividends from Bank |  |  |  |  |  |  |  |  | 37,000 | 60,000 | 30,000
Other |  |  |  |  |  |  |  |  | 483 | 663 | 1,784
Total income |  |  |  |  |  |  |  |  | 38,883 | 62,163 | 32,984
Expenses: |  |  |  |  |  |  |  |  |  |  |
Interest expense-subordinated debentures and notes |  |  |  |  |  |  |  |  | 9,885 | 7,507 | 5,798
Interest expense-notes payable |  |  |  |  |  |  |  |  | 705 | 1,182 | 62
Other expenses |  |  |  |  |  |  |  |  | 6,946 | 6,936 | 7,087
Total expenses |  |  |  |  |  |  |  |  | 17,536 | 15,625 | 12,947
Income before taxes and equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 21,347 | 46,538 | 20,037
Income tax benefit |  |  |  |  |  |  |  |  | 3,448 | 3,478 | 3,482
Net income |  |  |  |  |  |  |  |  | 24,795 | 50,016 | 23,519
Equity in undistributed earnings of subsidiaries |  |  |  |  |  |  |  |  | 49,589 | 42,723 | 65,698
Total comprehensive income |  |  |  |  |  |  |  |  | $ 74,384 | $ 92,739 | $ 89,217

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