CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest benefit	$ 4,412	$ 3,102	$ 11,780	$ 9,378
Gain (loss) on securities	(1,055)	1,535	(272)	4,347
Income tax expense (benefit)	14,118	13,250	41,637	45,064
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Interest benefit	189	(543)	552	(1,601)
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Net Unrealized Investment Gain (Loss)
Gain (loss) on securities	(1,070)	1,535	(1,720)	4,347
Reclassification out of accumulated other comprehensive income (loss) | Accumulated Other Comprehensive Income (Loss)
Income tax expense (benefit)	$ 302	$ 524	$ 466	$ 1,501