Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 126,051	$ 63,077	$ 49,370
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	(7,052)	44,250	2,905
Depreciation	6,306	6,512	4,231
Net amortization of premium and discounts on loans, securities, deposits and debt obligations	(284)	(5,157)	730
Amortization of mortgage servicing rights, net of impairment charges/recoveries	2,086	15,456	2,043
Amortization of intangibles	6,208	6,449	1,119
Mortgage banking gain, net	(16,437)	(36,683)	(7,932)
Loss on sale or disposals or write-downs of property, plant and equipment			10
Gain/loss on sale / write-down of real estate and other assets held for sale	(6)	(10)	180
Gain on sale of available for sale securities	(2,218)	(1,464)	(24)
Gain on equity securities	(1,954)	(90)
Change in deferred taxes	5,393	(9,781)	(419)
Proceeds from sale of loans held for sale	867,522	847,141	302,554
Origination of loans held for sale	(800,887)	(967,861)	(308,434)
Stock based compensation expense	2,827	2,312	286
Restricted stock forfeits for taxes and option exercises	(703)	(1,371)	560
Excess tax benefit (expense) on stock compensation plans			(108)
Income from bank owned life insurance	(5,121)	(3,306)	(2,158)
Changes in:
Accrued interest receivable and other assets	(5,755)	(14,729)	(6,916)
Other liabilities	(10,813)	(363)	1,688
Net cash provided by operating activities	165,163	(55,618)	39,685
Investing Activities
Proceeds from maturities, calls and paydowns of held-to-maturity securities			120
Proceeds from maturities, calls and paydowns of available-for-sale securities	149,197	124,731	49,104
Proceeds from sale of available-for-sale securities	158,012	52,420	2,667
Proceeds from sale of OREO	488	1,081	1,262
Purchases of available-for-sale securities	(806,083)	(362,426)	(33,463)
Purchases of equity securities	(11,053)	(1,000)
Purchases of office properties and equipment	(3,023)	(5,361)	(3,134)
Investment in bank owned life insurance	(18,307)	0	(6,600)
Proceeds from bank owned life insurance death benefit	1,445	0	874
Net change in Federal Home Loan Bank stock	4,441	8,642	2,302
Net cash received (paid) in acquisitions		52,448	(1,600)
Proceeds from sale of non-mortgage loans		5,241	21,239
Net increase (decrease) in loans receivable	192,069	(417,630)	(258,119)
Net cash used in investing activities	(332,814)	(541,854)	(225,348)
Financing Activities
Net increase in deposits and advance payments by borrowers	238,474	1,088,832	251,282
Net change in Federal Home Loan Bank advances		(466,063)	(126)
Proceeds from subordinated debentures	48,893	48,777
Decrease in securities sold under repurchase agreements		(2,999)	(2,742)
Cash dividends paid on common stock	(38,948)	(32,898)	(15,624)
Net cash paid for repurchase of common stock	(29,583)	(10,183)	(15,147)
Proceeds from exercise of stock options	8		189
Proceeds from direct treasury stock sales		18	123
Net cash provided by financing activities	169,951	625,484	217,955
Increase (decrease) in cash and cash equivalents	2,300	28,012	32,292
Cash and cash equivalents at beginning of period	159,266	131,254	98,962
Cash and cash equivalents at end of period	161,566	159,266	131,254
Supplemental cash flow information:
Interest paid	16,357	30,536	25,348
Income taxes paid	27,055	32,390	11,200
Transfer from other liability to equity	0
Transfers from held to maturity securities to available for sale securities			404
Transfers from loans to other real estate owned and other assets held for sale	220	192	337
Initial recognition of right-of-use asset	500	10,106	8,808
Initial recognition of lease liability	$ 500	10,254	$ 9,339
Initial recognition ASU 326		$ 2,566