CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Interest benefit	$ 3,560	$ 3,300
Gain (loss) on securities	2,872	(30)
Income tax expense (benefit)	12,117	15,333
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Interest benefit	0	(591)
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Net Unrealized Investment Gain (Loss)
Gain (loss) on securities	1,991	(30)
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Other Comprehensive Income (Loss)
Income tax expense (benefit)	$ 503	$ 143