Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities
Net income	$ 73,793	$ 87,003	$ 125,211
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	4,422	4,503	3,863
Provision for credit losses	13,800	8,200	17,750
Amortization of intangibles	1,235	1,438	1,685
Net accretion of loans	(879)	(1,904)	(3,178)
Accretion on bank premises	(49)	(49)	(49)
Accretion on deposits	(88)	(279)	(777)
Amortization on borrowings	22	21	40
Net deferred income tax (benefit) expense	(2,040)	4,135	(403)
Stock-based compensation	4,568	4,860	4,889
Change in fair value of equity securities, net	(2)	117	1,521
Gain on sale of loans held-for-sale, net	(2,723)	(1,704)	(1,695)
Net losses on disposition of fixed assets	477	0	22
Gain on sale of other real estate owned	0	22	6
Loans originated for resale	(29,340)	(26,153)	(21,128)
Proceeds from sale of loans held-for-sale	31,320	36,645	28,341
Increase in cash surrender value of bank owned life insurance	(7,142)	(6,316)	(5,597)
Amortization of premiums on investment securities, net	793	1,030	2,155
Amortization of subordinated debt issuance costs	505	1,184	304
Decrease (increase) in accrued interest receivable	3,610	(3,046)	(11,910)
Net change in operating leases	(155)	(54)	(182)
Decrease (increase) in other assets	8,691	(7,514)	(12,413)
(Increase) decrease in other liabilities	(40,118)	(9,248)	48,322
Net cash provided by operating activities	60,700	92,891	176,777
Cash flows from investing activities
Purchases	(80,519)	(42,143)	(339,059)
Maturities, calls and principal repayments	69,651	64,550	150,287
Net redemptions (purchases) of restricted investment in bank stocks	11,008	(4,853)	(18,778)
Purchases of equity securities	(1,526)	(2,870)	(3,538)
Loans held-for-sale payments	0	25	54
Net decrease (increase) in loans	57,941	(255,556)	(1,292,938)
Cash flow hedge premium payment	0	0	(6,965)
Purchases of premises and equipment	(3,793)	(7,433)	(3,301)
Purchases of bank owned life insurance	0	0	(30,000)
Proceeds from BOLI death benefits	1,114	0	0
Proceeds from disposition of fixed assets	1,275	0	697
Proceeds from sale of other real estate owned	0	242	309
Net cash provided by (used in) investing activities	55,151	(248,038)	(1,543,232)
Cash flows from financing activities
Net increase in deposits	284,000	179,859	1,024,446
Repayment of subordinated debt	0	(75,000)	0
Advances of Federal Holme Loan Bank ("FHLB") borrowings	866,529	2,946,500	4,203,181
Repayments of FHLB borrowings	(1,112,066)	(2,870,564)	(3,813,792)
Cash dividends paid on preferred stock	(6,036)	(6,036)	(6,037)
Cash dividends paid on common stock	(27,281)	(25,912)	(23,428)
Purchase of treasury stock	(5,820)	(17,497)	(13,127)
Proceeds from exercise of stock options	0	96	124
Share redemption for tax withholdings on performance units and deferred stock units earned	(1,403)	(1,900)	(2,133)
Net cash (used in) provided by financing activities	(2,077)	129,546	1,369,234
Net change in cash and cash equivalents	113,774	(25,601)	2,779
Cash and cash equivalents at beginning of period	242,714	268,315	265,536
Cash and cash equivalents at end of period	356,488	242,714	268,315
Supplemental disclosures of cash flow information:
Interest paid	270,946	230,806	67,850
Income taxes paid	24,001	31,647	49,234
Supplemental disclosures of noncash investing activities:
Transfer of loans to other real estate owned	0	0	579
Transfer of loans held-for-sale to loans held-for-investment	0	16,156	8,043
Transfer of loans held-for-investment to loans held-for-sale	$ 0	$ 11,197	$ 27,137