Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net income	$ 92,654	$ 97,315
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of premises and equipment	2,903	2,832
Provision for (reversal of) credit losses	14,450	(6,315)
Amortization of intangibles	1,276	1,498
Net accretion of loans	(2,448)	(4,130)
Accretion on bank premises	(37)	(61)
Accretion on deposits	(657)	(1,762)
Amortization (accretion) on borrowings, net	27	(43)
Stock-based compensation	3,519	3,202
Gains on sales/redemptions of securities available-for-sale, net	0	(195)
Losses on equity securities, net	1,431	242
Gain on sale of branches	0	(674)
Net losses on disposition of other premises and equipment	0	65
Gains on sale of loans held-for-sale, net	(1,519)	(2,668)
Loans originated for resale	(18,619)	(43,676)
Proceeds from sale of loans held-for-sale	25,955	57,674
Loss/(gain) on sale of other real estate owned	6	(18)
Increase in cash surrender value of bank owned life insurance	(4,069)	(3,527)
Amortization of premiums and accretion of discounts on securities available-for-sale	1,848	4,677
Amortization of subordinated debentures issuance costs	228	227
(Increase) decrease in accrued interest receivable	(4,788)	1,707
Net change in operating leases	(142)	(734)
(Increase) decrease in other assets	(4,781)	43,319
(Decrease) increase in other liabilities	(12,291)	5,689
Net cash provided by operating activities	94,946	154,644
Cash flows from investing activities
Purchases	(320,946)	(203,534)
Maturities, calls and principal repayments	135,548	215,531
Purchases of equity securities	(3,200)	(555)
Net (purchases) redemptions of restricted investment in bank stocks	(17,498)	6,993
Cash flow hedge premium payment	(6,965)	0
Payments on loans held-for-sale	5	32
Net increase in loans	(1,084,483)	(345,098)
Purchases of bank owned life insurance	(30,000)	(25,000)
Purchases of premises and equipment	(2,353)	(2,473)
Proceeds from sale of branches	0	1,087
Proceeds from sale of other real estate owned	309	321
Net cash used in investing activities	(1,329,583)	(352,696)
Cash flows from financing activities
Net increase in deposits	978,214	440,876
Repayment of subordinated debentures	0	(50,000)
Advances of borrowings	2,305,181	100,000
Repayments of borrowings	(1,943,448)	(272,686)
Cash dividends on preferred stock	(4,528)	0
Repurchase of treasury stock	(13,127)	(8,043)
Cash dividends paid on common stock	(17,338)	(12,345)
Proceeds from exercise of stock options	124	45
Net proceeds from the issuance of preferred stock	0	110,927
Share redemption for tax withholdings on performance units and restricted stock units earned	(2,133)	(1,283)
Net cash provided by financing activities	1,302,945	307,491
Net change in cash and cash equivalents	68,308	109,439
Cash and cash equivalents at beginning of period	265,536	303,756
Cash and cash equivalents at end of period	333,844	413,195
Supplemental disclosures of cash flow information
Interest paid on deposits and borrowings	34,552	32,664
Income taxes	31,426	35,809
Supplemental disclosures of noncash activities
Transfer of loans from held-for-investment to other real estate owned	579	304
Transfer of loans from held-for-investment to held-for-sale	13,652	14,211
Transfer of loans from held-for-sale to held-for-investment	$ 0	$ 1,963