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	$ 130,353	$ 71,289	$ 73,395
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and amortization of premises and equipment	3,757	4,244	3,053
(Reversal) of provision for credit losses	(5,500)	41,000	8,100
Amortization of intangibles	1,980	2,559	1,408
Net accretion of loans	(5,350)	(6,687)	(5,056)
Accretion on bank premises	(73)	(90)	(86)
Accretion on deposits	(2,224)	(4,301)	(1,149)
(Accretion) amortization on borrowings	(36)	(183)	209
Net deferred income tax expense	16	(7,495)	104
Stock-based compensation	4,536	2,949	2,942
Losses (gains) on sales/redemptions of investment securities, net	(195)	(29)	280
Change in fair value of equity securities, net	373	(202)	(294)
Gains (losses) on sale of loans held-for-sale, net	(3,807)	(2,085)	(512)
Gain on sale of branches	(674)
Net losses on disposition of other fixed assets	65
Gain on sale of other real estate owned	(18)
Loans originated for resale	(51,669)	(63,114)	(20,499)
Loss on extinguishment of debt			1,047
Proceeds from sale of loans held-for-sale	72,233	80,323	21,011
Net gains on disposition of premises and equipment			(8)
Net gains on sale of other real estate owned			(8)
Increase in cash surrender value of bank owned life insurance	(4,771)	(4,793)	(3,484)
Amortization of premiums and accretion of discounts on investments securities, net	5,966	5,506	4,299
Amortization of subordinated debt issuance costs	303	323	329
Increase (decrease) in accrued interest receivable	1,165	(11,458)	(301)
Net change in operating leases	(769)	41	1,312
Decrease (increase) in other assets	46,086	(22,498)	(22,619)
Increase (decrease) in other liabilities	10,526	(4,174)	(2,785)
Net cash provided by operating activities	202,273	81,125	60,688
Investment securities available-for-sale:
Purchases	(349,500)	(338,087)	(225,853)
Sales		19,624	183,728
Maturities, calls and principal repayments	285,873	256,782	178,116
Net (purchases)/redemptions of restricted investment in bank stocks	(2,727)	5,362	3,739
Purchases of equity securities	(780)	(2,000)
Sales of equity securities			569
Loans held-for-sale payments	38	1,186	47
Net increase in loans	(596,389)	(329,210)	(243,430)
Purchases of premises and equipment	(2,783)	(2,199)	(1,527)
Purchases of bank owned life insurance	(25,000)	(25,000)	(10,000)
Proceeds from life insurance death benefits		1,794
Proceeds from sale of branches	1,087
Proceeds from sale of premises and equipment			18
Cash and cash equivalents acquired in acquisitions, net		87,391	11,211
Proceeds from sale of other real estate owned	321	992	915
Net cash used in investing activities	(689,860)	(323,365)	(102,467)
Cash flows from financing activities
Net increase in deposits	375,953	410,605	260,489
(Repayment of) increase in subordinated debt	(50,000)	73,440
Advances of FHLB borrowings	340,000	1,526,489	2,597,000
Repayments of FHLB borrowings	(297,725)	(1,650,387)	(2,762,150)
Cash dividends paid on preferred stock	(1,717)
Cash dividends paid on common stock	(17,493)	(14,317)	(12,160)
Proceeds from preferred stock offering	110,927
Purchase of treasury stock	(9,401)	(911)	(12,643)
Proceeds from exercise of stock options	106	233	360
Share redemption for tax withholdings on performance units and restricted stock units earned	(1,283)	(639)
Net cash provided by financing activities	449,367	344,513	70,896
Net change in cash and cash equivalents	(38,220)	102,273	29,117
Cash and cash equivalents at beginning of period	303,756	201,483	172,366
Cash and cash equivalents at end of period	265,536	303,756	201,483
Cash payments for:
Interest paid	41,787	74,701	88,522
Income taxes paid	45,431	26,548	18,497
Supplemental disclosures of noncash investing activities:
Transfer of loans to other real estate owned	304		907
Transfer of loans held-for-sale to loans held-for-investment	4,293	10,995
Transfer of loans held-for-investment to loans held-for-sale	$ 16,628	$ 26,548	$ 33,297