Condensed Consolidated Statements of Cash Flows $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Cash flows from operating activities:
Net income	$ 12,868	$ 16,156
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	1,524	1,162
Provision for credit losses	22,264	1,476
Deferred income taxes	(183)	2,727
Net amortization of debt securities	1,054	407
Amortization of intangible assets	1,491	838
Gain on sale of investment securities	(4)	292
Mortgage loans originated-for-sale	(33,537)	(4,087)
Proceeds from mortgage loans sold	30,888	3,825
Valuation adjustments and sale of other real estate	52	(66)
Sale of state tax credits	(124)	(158)
Share-based Payment Arrangement, Noncash Expense	960	921
Net accretion of loan discount	(2,510)	(596)
Changes in other assets and liabilities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net	(2,181)	(7,185)
Net cash provided by operating activities	32,562	15,712
Cash flows from investing activities:
Payments for Previous Acquisition	0	(23,376)
Net decrease (increase) in loans	(134,482)	13,855
Sale of debt securities, available-for-sale	207	259,420
Paydown or maturity of debt securities, available-for-sale	55,932	27,684
Paydown or maturity of debt securities, held-to-maturity	1,595	1,269
Redemption of other investments	24,310	11,744
Sale of state tax credits held for sale	1,186	2,381
Sale of other real estate	443	66
Payments for the purchase of:
Available-for-sale debt securities	(69,336)	(221,711)
Other investments	(28,809)	(14,977)
State tax credits held for sale	(3,780)	(1,852)
Fixed assets, net	(918)	(1,268)
Net cash (used in) provided by investing activities	(153,652)	53,235
Cash flows from financing activities:
Net increase (decrease) in noninterest-bearing deposit accounts	27,223	(83,290)
Net increase (decrease) in interest-bearing deposit accounts	191,659	(48,770)
Repayments of FHLB advances, net	(300)	105,025
Proceeds from Issuance of Long-term Debt	0	40,000
Repayments of Long-term Debt	(1,429)	(2,000)
Net decrease in other borrowings	(57,825)	(49,279)
Cash dividends paid on common stock	(4,743)	(3,763)
Payments for Repurchase of Common Stock	(15,347)	0
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(1,721)	(1,940)
Net cash provided by (used in) financing activities	137,517	(44,017)
Net increase in cash and cash equivalents	16,427	24,930
Cash and cash equivalents, beginning of period	167,256	196,552
Cash and cash equivalents, end of period	183,683	221,482
Supplemental Cash Flow Information [Abstract]
Cash paid during the period for interest	13,026	14,020
Noncash transactions:
Transfer to other real estate owned in settlement of loans	0	1,372
Right-of-use assets obtained in exchange for lease obligations	$ 200	$ 0
Common shares issued related to acquisition	0	171,885