Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 29,926	$ 12,868
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,581	1,524
Provision for credit losses	46	22,264
Deferred income taxes	3,834	(183)
Net amortization of debt securities	1,937	1,054
Amortization of intangible assets	1,415	1,491
Gain (Loss) on Sale of Debt Investments	0	(4)
Mortgage loans originated-for-sale	(49,065)	(33,537)
Proceeds from mortgage loans sold	52,908	30,888
Sale of other real estate	(47)	52
Sale of state tax credits	(326)	(124)
Share-based Payment Arrangement, Noncash Expense	1,275	960
Net accretion of loan discount	(736)	(2,510)
Changes in other assets and liabilities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(46,423)	(2,181)
Net cash (used in) provided by operating activities	(3,675)	32,562
Cash flows from investing activities:
Net increase in loans	(69,907)	(134,482)
Sale of debt securities, available-for-sale	0	207
Paydown or maturity of debt securities, available-for-sale	69,953	55,932
Paydown or maturity of debt securities, held-to-maturity	18,220	1,595
Redemption of other investments	752	24,310
Sale of state tax credits held for sale	1,632	1,186
Sale of other real estate	450	443
Payments for the purchase of:
Available-for-sale debt securities	(118,791)	(69,336)
Other investments	(3,660)	(28,809)
State tax credits held for sale	0	(3,780)
Fixed assets, net	(489)	(918)
Net cash used in investing activities	(101,840)	(153,652)
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	198,389	27,223
Net increase in interest-bearing deposit accounts	331,666	191,659
Proceeds from FHLB advances, net	0	(300)
Repayments of Long-term Debt	(2,857)	(1,429)
Net decrease in other borrowings	(68,835)	(57,825)
Cash dividends paid on common stock	(5,627)	(4,743)
Payments for Repurchase of Common Stock	0	(15,347)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,109)	(1,721)
Net cash provided by financing activities	451,627	137,517
Net increase in cash and cash equivalents	346,112	16,427
Cash and cash equivalents, beginning of period	537,703	167,256
Cash and cash equivalents, end of period	883,815	183,683
Noncash transactions:
Cash paid during the period for interest	4,836	13,026
Income Taxes Paid, Net	30,167	0
Transfer to other real estate owned in settlement of loans	1,236	0
Right-of-use assets obtained in exchange for lease obligations	$ 0	$ 200