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Accumulated Other Comprehensive Income (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]      
(Losses) gains on investment securities available-for-sale $ (680) $ 279 $ 0
Income before income taxes 154,885 106,341 120,154
Income tax expense (36,328) (24,880) (28,139)
Net income 118,557 81,461 $ 92,015
Unrealized gains and losses on available-for-sale securities | Amount reclassified from Accumulated Other Comprehensive Income      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
(Losses) gains on investment securities available-for-sale (680) 279  
Income before income taxes (680) 279  
Income tax expense 160 (65)  
Net income $ (520) $ 214