Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Operating Activities
Net income			$ 26,294	$ 27,458
Items not requiring (providing) cash
Provision for credit losses	$ 7,057	$ 896	15,657	1,260
Depreciation and amortization			4,909	4,380
Share based compensation			77	115
Mortgage servicing rights income			(466)	(1,165)
Mortgage servicing rights net impairment			3,201	(11)	$ 192
Premium amortization on securities, net			4,266	2,589
(Gain) loss on sale of investment securities	(248)	100	(587)	85
Gain on sale of mortgage loans	(6,620)	(2,078)	(10,093)	(3,387)
Proceeds from sales of loans			258,207	92,314
Loans originated for sale			(259,939)	(91,074)
Change in cash value life insurance			(1,111)	(1,068)
Gain on sale of other real estate owned			7	(11)
Net change in:
Interest receivable			(1,357)	(2,288)
Interest payable			(709)	148
Other assets			1,811	97,207
Other liabilities			661	7,780
Net cash provided by operating activities			40,828	134,332
Investing Activities
Purchases of securities available for sale			(207,160)	(176,629)
Proceeds from sales, maturities, calls and principal repayments of securities available for sale			126,826	165,638
Proceeds from maturities of securities held to maturity			16,138	4,551
Net change in interest-earning time deposits			(792)	7,654
Change in FHLB stock			(1,161)	(803)
Net change in loans			(340,505)	(84,406)
Proceeds on the sale of OREO and repossessed assets			444	1,260
Change in premises and equipment, net			(2,913)	(1,538)
Death benefit on bank owned life insurance			233	367
Repurchase of outstanding stock			(19,636)	0
Net cash provided by (used in) investing activities			(428,526)	44,839
Net change in:
Deposits			376,597	50,049
Borrowings			33,458	(184,548)
Proceeds from issuance of stock			671	1,496
Net proceeds from issuance of subordinated notes			58,824	0
Dividends paid on common stock			(10,548)	(9,974)
Net cash provided by (used in) financing activities			459,002	(142,977)
Net Change in Cash and Cash Equivalents			71,304	36,194
Cash and Cash Equivalents, Beginning of Period			98,831	58,492	58,492
Cash and Cash Equivalents, End of Period	$ 170,135	$ 94,686	170,135	94,686	$ 98,831
Additional Supplemental Information
Interest paid			18,786	22,440
Income taxes paid			0	1,300
Transfer of loans to other real estate and repossessed assets			939	1,213
Transfer of premises to other real estate			0	1,564
Right-of-use assets exchanged for lease obligations			0	3,411
Salin
Investing Activities
Net cash received in acquisition, Salin			$ 0	$ 128,745