Parent Company Financial Information - Schedule of Condensed Cash Flow Statement for Parent Company Only (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Flows From Operating Activities
Net Income (Loss)	$ (138,052)	$ (47,035)	$ 100,534
Adjustments to reconcile net income to net cash provided by operating activities:
Securities premium amortization, net	4,494	5,416	6,189
Provision for (reversal of) credit losses for investment securities held-to-maturity	293,097	66,360	31,536
Depreciation and amortization	2,947	3,198	3,480
(Increase) decrease in other assets	(37,644)	(7,703)	(14,976)
Increase (decrease) in other liabilities	(28,686)	(6,201)	58,395
Net cash provided by operating activities	28,495	123,770	195,626
Cash Flows From Investing Activities:
Proceeds from maturities of held-to-maturity securities	68,276	70,235	78,251
Net cash (used in) provided by investing activities	570,433	310,737	(97,699)
Cash Flows From Financing Activities:
Proceeds from exercise of stock options	0	0	0
Proceeds from employee stock purchase plan	436	485	586
Common stock repurchased	0	0	(48,033)
Cash dividends paid	(15,314)	(45,617)	(54,993)
Net cash provided by (used in) financing activities	(536,715)	(523,711)	312,903
Net Increase (Decrease) in Cash and Cash Equivalents	62,213	(89,204)	410,830
Cash and Cash Equivalents at Beginning of Period	633,480	722,684	311,854
Cash and Cash Equivalents at End of Period	695,693	633,480	722,684
Parent Company
Cash Flows From Operating Activities
Net Income (Loss)	(138,052)	(47,035)	100,534
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to reconcile net income (loss) to net cash used in operating activities: Equity in undistributed income (loss) of subsidiary	139,486	138,487	18,549
Net tax benefits from stock based compensation expense	7,047	9,561	10,018
Securities premium amortization, net	0	1,004	6
Provision for (reversal of) credit losses for investment securities held-to-maturity	(195)	(449)	1,124
Depreciation and amortization	330	82	124
(Increase) decrease in other assets	(8,662)	(11,935)	(10,397)
Increase (decrease) in other liabilities	56	2,917	(1,064)
Net cash provided by operating activities	10	92,632	118,894
Cash Flows From Investing Activities:
Investment in subsidiary	0	(70,000)	0
Purchases of held-to-maturity investment securities	0	0	0
Proceeds from maturities of held-to-maturity securities	0	0	0
Net cash (used in) provided by investing activities	0	(70,000)	0
Cash Flows From Financing Activities:
Net proceeds from long-term borrowings	0	7,665	0
Proceeds from exercise of stock options	0	0	0
Proceeds from employee stock purchase plan	436	485	586
Common stock repurchased	0	0	(47,631)
Cash dividends paid	(15,314)	(45,617)	(54,993)
Net cash provided by (used in) financing activities	(14,878)	(37,467)	(102,038)
Net Increase (Decrease) in Cash and Cash Equivalents	(14,868)	(14,835)	16,856
Cash and Cash Equivalents at Beginning of Period	23,561	38,396	21,540
Cash and Cash Equivalents at End of Period	8,693	23,561	38,396
Non-Cash Investing Activities
Transfers Of Investment Securities From Available-for-sale To Held-to-maturity	$ 0	$ 0	$ 0