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Other Comprehensive Income - Amounts reclassified from accumulated other comprehensive income (loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Realized gain on sale of investment securities $ 2,964 $ 1,815 $ 1,517
Interest income (expense) derivative deposits (27,772) (53,566) (91,026)
Income tax (expense) benefit (60,983) (43,928) (53,848)
Net Income 176,691 132,217 142,943
Reclassification out of Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Realized gain on sale of investment securities 2,964 1,815 1,517
Interest income (expense) derivative deposits (516) (1,145) 1,198
Income tax (expense) benefit (629) (167) (744)
Net Income $ 1,819 $ 503 $ 1,971