Parent Company Financial Statements, Condensed Statements of Income and Comprehensive Income (loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Expenses [Abstract]
Interest expense	$ 95,540	$ 28,640	$ 15,090
Other expenses	15,895	15,319	11,968
Income tax benefit	20,564	19,228	22,704
Net income	78,004	81,814	87,939
Unrealized holding gains (losses) on debt securities available-for-sale [Abstract]
Unrealized holding gains (losses) arising during the period	36,863	(168,060)	(24,827)
Less: Reclassification adjustments for realized gains (losses) included in net income	4	(81)	60
Other comprehensive income (loss), net of tax	25,831	(124,304)	(18,416)
Comprehensive income (loss)	103,835	(42,490)	69,523
Parent Company [Member]
Income [Abstract]
Dividends from subsidiaries	29,931	31,544	33,319
Other income	1,400	710	482
Total income	31,331	32,254	33,801
Expenses [Abstract]
Interest expense	4,287	2,060	1,090
Depreciation expense	125	75	70
Other expenses	4,718	4,833	5,878
Total expenses	9,130	6,968	7,038
Income before income taxes and equity in undistributed income of subsidiaries	22,201	25,286	26,763
Income tax benefit	(2,012)	(1,808)	(1,700)
Income before equity in undistributed income of subsidiaries	24,213	27,094	28,463
Equity in undistributed income of subsidiaries	53,791	54,720	59,476
Net income	78,004	81,814	87,939
Unrealized holding gains (losses) on debt securities available-for-sale [Abstract]
Unrealized holding gains (losses) arising during the period	36,863	(168,060)	(24,827)
Less: Reclassification adjustments for realized gains (losses) included in net income	4	(81)	60
Tax expense (benefit)	11,028	(43,675)	(6,471)
Other comprehensive income (loss), net of tax	25,831	(124,304)	(18,416)
Comprehensive income (loss)	$ 103,835	$ (42,490)	$ 69,523