Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 38,341	$ 58,046
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	(1,654)	(13,901)
Reversal of provision for credit losses	(4,781)	(21,186)
Stock-based compensation expense	1,793	1,796
Amortization of intangible assets	1,408	1,594
Origination of mortgage loans held for sale	(12,396)	(53,807)
Proceeds from sale of mortgage loans held for sale	13,021	58,373
Bank owned life insurance income	(2,459)	(1,373)
Valuation adjustment on interest rate swaps	(64)	(254)
Gain on sale of mortgage loans held for sale, net	(460)	(2,373)
Gain on sale of investment securities, net	0	(29)
Gain on sale of assets held for sale	(204)	(746)
Other	1,360	3,630
Net cash provided by operating activities	33,905	29,770
Cash flows from investing activities:
Loan originations and purchases, net of payments	(51,198)	295,618
Maturities and repayments of investment securities available for sale	86,678	126,669
Maturities and repayments of investment securities held to maturity	11,767	0
Purchase of investment securities available for sale	(472,361)	(388,636)
Purchase of investment securities held to maturity	(244,911)	0
Purchase of premises and equipment	(1,191)	(1,748)
Purchases of bank owned life insurance	(105)	(105)
Purchases of Federal Home Loan Bank stock	(985)	(1,272)
Proceeds from sales of investment securities available for sale	0	1,248
Proceeds from redemption of Federal Home Loan Bank stock	2	0
Proceeds from sales of assets held for sale	1,173	3,730
Proceeds from sales of premises and equipment	0	10
Capital contributions to low-income housing tax credit partnerships	(978)	(12,637)
Cash received from return of New Market Tax Credit equity method investment	0	9,642
Net cash (used) provided by investing activities	(672,109)	32,519
Cash flows from financing activities:
Net (decrease) increase in deposits	(64,100)	463,716
Federal Home Loan Bank advances	50	10
Repayment of Federal Home Loan Bank advances	(50)	(10)
Common stock cash dividends paid	(14,747)	(14,383)
Net (decrease) increase in securities sold under agreement to repurchase	(9,012)	10,746
Repurchase of common stock	(3,174)	(757)
Net cash (used) provided by financing activities	(91,033)	459,322
Net (decrease) increase in cash and cash equivalents	(729,237)	521,611
Cash and cash equivalents at beginning of period	1,723,292	743,322
Cash and cash equivalents at end of period	994,055	1,264,933
Supplemental disclosures of cash flow information:
Cash paid for interest	3,188	3,571
Cash paid for income taxes, net of refunds	167	7,967
Investment in LIHTC partnership and related funding commitment	11,284	0
Right of use assets obtained in exchange for new operating lease liabilities	2,222	8,393
Transfer of bank owned life insurance to prepaid expenses and other assets due to death benefit accrued	2,114
Transfers of properties classified as held for sale to prepaid expenses and other assets from premises and equipment, net	730	1,685
Loans received from return of New Market Tax Credit equity method investment	$ 0	$ 15,596