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Condensed Parent Company Statements - Statements of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Condensed Income Statements, Captions [Line Items] |  |  |
Interest expense | $ 20,752 | $ 40,565 | $ 54,602
Parent Company [Member] |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |
Dividends from subsidiary bank | 74,000 | 40,000 | 32,000
Other income |  | 5 |
Loss on other investments |  |  | (23)
Total income | 74,000 | 40,005 | 31,977
Operating expenses | 2,121 | 2,197 | 2,044
Interest expense | 7,613 | 7,459 | 5,397
Total expense | 9,734 | 9,656 | 7,441
Income before income tax and equity in undistributed earnings of subsidiaries | 64,266 | 30,349 | 24,536
Credit for income taxes | (1,850) | (1,800) | (1,381)
Income before equity in earnings of subsidiaries | 66,116 | 32,149 | 25,917
Equity in undistributed earnings of subsidiaries | 8,511 | 27,164 | 47,695
Net income | $ 74,627 | $ 59,313 | $ 73,612

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