CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 19,660	$ 5,437
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	826	1,363
Deferred income tax expense	(1,699)	(727)
Stock-based compensation	1,879	1,785
Provision for loan losses	3,987	216
Net amortization of investment securities	346	118
Stock dividends received on correspondent bank stock	(12)	(25)
Increase in cash surrender value of company-owned life insurance	(273)	(284)
Net gain on mortgage loans	(24,958)	(8,009)
Gain on sales of securities		(119)
Origination of mortgage loans held for sale	(917,524)	(442,790)
Proceeds from mortgage loans	889,208	393,886
Proceeds from sale of securities		(119)
Loss on assets held for sale	553	(1,600)
Loss on impairment of goodwill		1,572
Provision on other real estate owned	100
Net changes in operating assets and liabilities:
Accounts receivable	492	(468)
Accrued interest receivable and other assets	(5,531)	(81)
Accrued interest payable and other liabilities	3,394	1,847
Net cash used in operating activities	(29,552)	(46,279)
Activity in available-for-sale securities:
Maturities, prepayments, and calls	20,890	6,202
Sales		7,506
Purchases	(2,000)	(29,750)
Purchases of correspondent bank stock	(698)	(1,237)
Redemption of correspondent bank stock		3,168
Purchases of premises and equipment	(708)	(380)
Proceeds from sale of premises and equipment	10
Net cash paid on acquisitions (Note 2)	(61,316)
Loan and note receivable originations and principal collections, net	(388,048)	(32,439)
Net cash used in investing activities	(431,870)	(46,930)
Cash flows from financing activities
Net change in deposits	413,808	171,146
Proceeds from subordinated notes	8,000
Settlement of restricted stock	(258)	(110)
Recognition of capitalized subordinated notes issuance costs	(113)
Repurchase of common stock	(370)	(8)
Payments To Federal Reserve borrowings	(238)
Proceeds from Federal Reserve borrowings	204,313
Payments to Federal Home Loan Bank Topeka borrowings	(27,000)	(72,346)
Proceeds from Federal Home Loan Bank Topeka borrowings	35,000	67,346
Net cash provided by financing activities	633,142	166,028
Net change in cash and cash equivalents	171,720	72,819
Cash and cash equivalents, beginning of year	78,638	73,357
Cash and cash equivalents, end of period	250,358	146,176
Supplemental cash flow information:
Interest paid on deposits and borrowed funds	5,699	9,702
Income tax payment, net of refunds received	6,417	1,562
Cash paid for amounts included in the measurement of lease liabilities	4,267	4,091
Supplemental noncash disclosures:
Adoption of ASU 2018-02 - Reclassification of stranded tax effects		235
Change in unrealized gain	1,305	2,364
Lease right-of-use-asset obtained in exchange for lease liabilities	649	16,580
Reclass of held for sale assets, net of liabilities	$ 10	$ 3,442