CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 112,974	$ 64,024	$ 58,544
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation	12,037	10,720	8,135
Net accretion on loans	(9,289)	(10,711)	(5,568)
Amortization of subordinated notes issuance costs	1,224	182	116
Amortization of junior subordinated debentures	530	506	483
Net amortization on securities	(992)	(129)	205
Amortization of intangible assets	10,876	8,330	9,131
Deferred taxes	(5,832)	(2,080)	3,931
Credit loss expense (benefit)	(8,830)	38,329	7,942
Stock based compensation	20,315	4,618	3,654
Net (gains) losses on sale or call of securities	(5)	(3,226)	(61)
Net (gains) losses on equity securities	322	(389)	(393)
Origination of loans held for sale	(37,542)	(60,867)	(32,570)
Purchases of loans held for sale	(21,746)	(50,765)	(30,486)
Proceeds from sale of loans originated for sale	60,037	109,471	63,080
Net gains on sale of loans	(1,859)	(3,585)	(653)
Net (gains) losses on loans transferred to loans held for sale	(1,247)	770	(1,669)
Net OREO (gains) losses and valuation adjustments	347	616	(351)
Net change in operating leases	2,242	1,054	181
Gain on sale of subsidiary or division	0	(9,758)	0
Contingent consideration paid	0	(22,000)	0
(Increase) decrease in other assets	(8,684)	12,215	(14,991)
Increase (decrease) in other liabilities	12,081	10,002	3,790
Net cash provided by (used in) operating activities	136,959	97,327	72,450
Cash flows from investing activities:
Purchases of securities available for sale	(58,787)	(133,970)	(80,459)
Proceeds from sales of securities available for sale	0	70,198	40,617
Proceeds from maturities, calls, and pay downs of securities available for sale	99,152	96,768	129,382
Proceeds from maturities, calls, and pay downs of securities held to maturity	1,003	693	993
Purchases of loans held for investment	(94,314)	(324,892)	(129,428)
Proceeds from sale of loans	87,813	165,877	47,832
Net change in loans	153,946	(632,517)	(506,816)
Purchases of premises and equipment, net	(14,362)	(17,574)	(21,338)
Net proceeds from sale of OREO	1,253	2,111	2,762
(Purchases) redemptions of FHLB and other restricted stock, net	(3,395)	13,109	(3,917)
Proceeds from BOLI	2,273	0	0
Cash paid for acquisitions, net of cash acquired	(96,926)	(108,375)	0
Proceeds from sale of subsidiary or division, net	0	93,835	0
Net cash provided by (used in) investing activities	77,656	(774,737)	(520,372)
Cash flows from financing activities:
Net increase (decrease) in deposits	(69,921)	921,333	339,557
Increase (decrease) in customer repurchase agreements	(996)	1,066	(2,452)
Increase (decrease) in Federal Home Loan Bank advances	75,000	(325,000)	100,000
Proceeds from Paycheck Protection Program Liquidity Facility borrowings	226,630	231,370	0
Repayment of Paycheck Protection Program Liquidity Facility borrowings	(391,346)	(39,510)	0
Proceeds from issuance of subordinated notes, net	68,224	0	38,282
Repayment of subordinated notes	(50,000)	0	0
Issuance of common stock, net of issuance costs	0	0	0
Issuance of preferred stock, net of issuance costs	0	42,364	0
Stock option exercises	577	(227)	0
Proceeds from employee stock purchase plan common stock issuance	449	0	0
Purchase of treasury stock	(1,241)	(35,772)	(64,524)
Dividends on preferred stock	(3,206)	(1,701)	0
Net cash provided by (used in) financing activities	(145,830)	793,923	410,863
Net increase (decrease) in cash and cash equivalents	68,785	116,513	(37,059)
Cash and cash equivalents at beginning of period	314,393	197,880	234,939
Cash and cash equivalents at end of period	383,178	314,393	197,880
Supplemental cash flow information:
Interest paid	18,950	41,743	52,006
Income taxes paid, net	40,004	12,080	17,748
Cash paid for operating lease liabilities	2,296	4,236	4,196
Supplemental noncash disclosures:
Loans transferred to OREO	692	1,150	3,360
Loans transferred to loans held for sale	83,975	185,823	46,163
Assets transferred to assets held for sale	0	84,077	0
Lease liabilities arising from obtaining right-of-use assets	19,571	1,777	2,557
Indemnification reduction	$ 35,633	$ 0	$ 0