Consolidated Statements of Cash Flows - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 203,043	$ 133,055	$ 74,384
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	5,573	6,147	6,152
Provision (benefit) for credit losses	(611)	13,385	65,398
Deferred income taxes	2,194	545	(12,578)
Net amortization of debt securities	5,639	7,343	6,745
Net amortization (accretion) on loans	266	(1,140)	(7,767)
Amortization of intangible assets	5,367	5,690	5,673
Amortization of servicing assets	3,066	2,311	37
Mortgage loans originated-for-sale	(67,470)	(159,670)	(223,094)
Proceeds from mortgage loans sold	73,014	163,864	217,934
Investment securities	0	0	(421)
Other real estate	93	(931)	13
Fixed assets	(54)	0	0
State tax credits	(1,506)	(2,220)	(2,016)
Asset impairment	0	3,441	0
Share-based compensation	8,006	6,017	4,178
Changes in other assets and liabilities, net	(19,980)	(17,262)	876
Net cash provided by operating activities	216,640	160,575	135,514
Cash flows from investing activities:
Net cash paid for acquisitions and dispositions	0	212,642	62,114
Net (increase) decrease in loans	(722,677)	138,455	(700,096)
Sale of debt securities, available-for-sale	0	27,135	20,221
Paydown or maturity of debt securities, available-for-sale	238,909	306,360	329,350
Paydown or maturity of debt securities, held-to-maturity	11,913	49,947	41,377
Redemption of other investments	12,989	18,159	43,555
Sale of state tax credits held-for-sale	20,645	18,507	14,252
Sale of other real estate	2,517	5,915	652
Sale of fixed assets	1,699	0	0
Settlement of bank-owned life insurance policies	534	0	1,993
Payments for the purchase of:
Available-for-sale debt securities	(728,247)	(779,481)	(452,541)
Held-to-maturity debt securities	(182,004)	0	0
Other investments	(19,286)	(9,564)	(50,421)
State tax credits held-for-sale	(18,846)	(8,689)	(11,026)
Fixed assets	(1,930)	(2,500)	(2,259)
Net cash used in investing activities	(1,383,784)	(23,114)	(702,829)
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	64,296	869,203	627,756
Net (decrease) increase in interest-bearing deposit accounts	(578,945)	648,778	505,604
Proceeds from the issuance of subordinated notes	0	0	61,953
Payments for the redemption of subordinated notes	0	(50,000)	0
Net increase (decrease) in short term FHLB advances, net	100,000	(160,000)	(172,300)
Repayments of long-term FHLB advances	(50,000)	0	0
Repayment of PPPLF advances	0	0	(86,096)
Repayments of notes payable	(5,714)	(7,143)	(4,286)
Net (decrease) increase in other borrowings	(24,030)	59,925	40,195
Dividends paid on common stock	(33,602)	(26,153)	(19,795)
Repurchase of common stock	(32,923)	(60,589)	(15,347)
Dividends paid on preferred stock	(4,041)	0	0
Proceeds from issuance of preferred stock, net	0	71,988	0
Other, net	1,773	516	78
Net cash (used in) provided by financing activities	(563,186)	1,346,525	937,762
Net (decrease) increase in cash and cash equivalents	(1,730,330)	1,483,986	370,447
Cash and cash equivalents, beginning of period	2,021,689	537,703	167,256
Cash and cash equivalents, end of period	291,359	2,021,689	537,703
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	40,736	23,957	35,423
Cash paid during the period for income taxes	46,009	56,845	7,514
Noncash investing and financing transactions:
Real Estate Owned, Transfer to Real Estate Owned	0	3,227	798
Sales of other real estate financed	0	228	48
Transfer of securities from available-for-sale to held-to-maturity	116,927	0	352,665
Transfer from fixed assets to loans	0	0	3,336
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 9,512	$ 5,658	$ 1,623
Shares issued in connection with acquisition (in shares)	0	343,650	167,035