Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2020		Mar. 31, 2019	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 6,579		$ 14,939
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	1,356		1,427
Deferred taxes	(2,037)		2,008
Stock-based compensation	228		200
Provision for credit losses	12,707	[1]	190	$ 4,819
Write-downs of other real estate owned and other repossessed assets	458		489
Gains on sale of mortgage loans held for sale	(483)		(330)
Securities gains, net	(481)		(1)
Change in fair market value of equity securities	232		(355)
Gains on sale of assets, net	(3)		(51)
Proceeds from sale of mortgage loans held for sale	23,032		14,927
Funding of mortgage loans held for sale	(22,785)		(25,785)
Amortization of securities premiums and discounts, net	1,271		1,112
Change in cash surrender value of bank owned life insurance	(340)		(357)
Payment of operating lease liabilities	(444)		0
Mortgage servicing rights:
Fair value adjustments	926		(116)
New servicing assets created	(144)		333
Changes in:
Accrued interest receivable	156		683
Other assets	(1,173)		6,399
Accrued interest payable	608		(1,081)
Other liabilities	(5,939)		(2,541)
Net cash provided by operating activities	13,724		12,090
Certificates of deposit in other banks:
Maturity of certificates of deposit	0		2,450
Securities available-for-sale (AFS):
Purchase of AFS securities	(126,748)		(59,583)
Proceeds from the sales of AFS securities	21,746		12,550
Proceeds from prepayments and maturities of AFS securities	72,243		46,491
Securities held-to-maturity (HTM):
Proceeds from maturities of HTM securities	517		30
Change in loans, net	(41,183)		18,755
Purchase of premises and equipment	(423)		(226)
Redemption of stock by Federal Home Loan Bank	0		2,452
Investment in Federal Home Loan Bank stock	(880)		0
Proceeds from sale of other real estate owned and repossessed assets	116		964
Net cash provided by (used in) investing activities	(74,612)		23,883
Cash flows from financing activities:
Change in deposits, net	(10,464)		77,153
Change in repurchase agreements and federal funds purchased, net	6,992		5,414
Proceeds from Federal Home Loan Bank advances	25,000		30,000
Payments on advances from Federal Home Loan Bank	(25,004)		(30,005)
Payment of finance lease liabilities	(3)		0
Issuance of common stock	232		258
Repurchase of common stock	(1,099)		0
Dividends paid	(6,747)		(6,383)
Net cash provided by (used in) financing activities	(11,093)		76,437
Net increase (decrease) in cash and cash equivalents	(71,981)		112,410
Cash and cash equivalents at beginning of period	264,683		141,450	141,450
Cash and cash equivalents at end of period	192,702		253,860	$ 264,683
Supplemental disclosures:
Interest paid	7,848		8,830
Non-cash activities:
Loans to facilitate the sale of other real estate owned and repossessed assets	718		1,797
Common stock dividends accrued, paid in subsequent quarter	224		215
Real estate acquired in settlement of loans	$ 1,625		$ 854

[1] *Effective January 1, 2020, the provision for loan losses became the provision for credit losses with the implementation of ASU 2016-13, commonly referred to as CECL.