Condensed Consolidated Statements of Cash Flows $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Cash flows from operating activities:
Net income	$ 45,453	$ 63,649
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	4,573	4,187
Provision for credit losses	55,935	5,031
Deferred income taxes	(9,609)	4,777
Net amortization of debt securities	4,775	2,009
Amortization of intangible assets	4,256	3,993
Gain (Loss) on Sale of Debt Investments	(421)	(45)
Mortgage loans originated-for-sale	(164,151)	(39,260)
Proceeds from mortgage loans sold	157,377	33,503
Sale of other real estate	13	(59)
Sale of state tax credits	(290)	(469)
Share-based Payment Arrangement, Noncash Expense	3,069	3,016
Net accretion of loan discount	(5,976)	(8,101)
Changes in other assets and liabilities, net
Increase (Decrease) in Other Operating Assets and Liabilities, Net	5,243	(5,661)
Net cash provided by operating activities	100,247	66,570
Cash flows from investing activities:
Payments for Previous Acquisition	0	(23,377)
Net increase in loans	(800,812)	(197,514)
Sale of debt securities, available-for-sale	20,221	314,189
Paydown or maturity of debt securities, available-for-sale	234,267	95,386
Paydown or maturity of debt securities, held-to-maturity	25,833	4,760
Redemption of other investments	26,350	43,034
Sale of state tax credits held for sale	5,621	3,978
Sale of other real estate	652	4,380
Proceeds from Life Insurance Policy	1,993	0
Payments for the purchase of:
Available-for-sale debt securities	(274,677)	(467,695)
Other investments	(40,714)	(61,226)
State tax credits held for sale	(11,026)	(9,666)
Fixed assets, net	(1,633)	(4,008)
Net cash used in investing activities	(813,925)	(297,759)
Cash flows from financing activities:
Net increase in noninterest-bearing deposit accounts	602,192	25,653
Net increase (decrease) in interest-bearing deposit accounts	303,011	(70,446)
Proceeds from FHLB advances, net	27,700	384,500
Proceeds from Issuance of Long-term Debt	0	41,000
Repayments of Long-term Debt	(4,286)	(6,286)
Proceeds from Issuance of Subordinated Long-term Debt	61,953	0
Net decrease in other borrowings	(21,848)	(58,530)
Cash dividends paid on common stock	(14,176)	(12,055)
Payments for Repurchase of Common Stock	(15,347)	(11,817)
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture	(562)	(880)
Net cash provided by financing activities	938,637	291,139
Net increase in cash and cash equivalents	224,959	59,950
Cash and cash equivalents, beginning of period	167,256	196,552
Cash and cash equivalents, end of period	392,215	256,502
Noncash transactions:
Cash paid during the period for interest	26,858	49,862
Income Taxes Paid, Net	7,514	12,955
Transfer to other real estate owned in settlement of loans	261	7,964
Sales of other real estate financed	48	0
Right-of-use assets obtained in exchange for lease obligations	$ 200	$ 0
Common shares issued related to acquisition	0	171,885
Transfer to Investments	$ 163,592	$ 0