Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 47,693	$ 29,926
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,472	1,581
Provision (benefit) for credit losses	(4,068)	46
Deferred income taxes	5,248	3,834
Net amortization of debt securities	1,625	1,937
Net amortization (accretion) on loan discount/premiums	429	(736)
Amortization of intangible assets	1,429	1,415
Amortization of servicing assets	648	165
Mortgage loans originated-for-sale	(27,811)	(49,065)
Proceeds from mortgage loans sold	29,636	52,908
Sale of other real estate	(19)	(47)
Sale of state tax credits	(9)	(326)
Share-based compensation	1,686	1,275
Changes in other assets and liabilities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(8,076)	(46,588)
Net cash provided by (used in) operating activities	49,883	(3,675)
Cash flows from investing activities:
Net increase in loans	(39,536)	(69,907)
Paydown or maturity of debt securities, available-for-sale	63,506	69,953
Paydown or maturity of debt securities, held-to-maturity	5,097	18,220
Redemption of other investments	1,248	752
Sale of state tax credits held for sale	261	1,632
Sale of other real estate	1,419	450
Settlement of bank-owned life insurance policies	534	0
Payments for the purchase of:
Available-for-sale debt securities	(313,875)	(118,791)
Held-to-maturity debt securities	(1,120)	0
Other investments	(8,154)	(3,660)
State tax credits held for sale	(7,212)	0
Fixed assets	(457)	(489)
Net cash used in investing activities	(298,289)	(101,840)
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	302,607	198,389
Net increase in interest-bearing deposit accounts	57,729	331,666
Repayments of notes payable	(1,429)	(2,857)
Net decrease in other borrowings	(123,589)	(68,835)
Repurchase of common stock	(16,974)	0
Cash dividends paid on common stock	(7,915)	(5,627)
Cash dividends paid on preferred stock	(1,229)	0
Taxes paid in net settlement of equity awards	(1,163)	(1,109)
Net cash provided by financing activities	208,037	451,627
Net (decrease) increase in cash and cash equivalents	(40,369)	346,112
Cash and cash equivalents, beginning of period	2,021,689	537,703
Cash and cash equivalents, end of period	1,981,320	883,815
Noncash investing and financing transactions:
Cash paid during the period for interest	4,725	4,836
Cash paid during period for income taxes	979	30,167
Transfer to other real estate owned in settlement of loans	0	1,236
Right-of-use assets obtained in exchange for lease obligations	4,178	0
Transfer of securities from available-for-sale to held-to-maturity	$ 116,927	$ 0