CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities
Net income	$ 14,822	$ 34,521	$ 28,099
Adjustments to reconcile net income to net cash from operating activities
Depreciation and amortization on premises and equipment	1,800	1,713	1,482
Accretion of purchase accounting adjustments	(700)	(1,338)	(1,078)
Net amortization of securities	6,876	8,083	10,129
Amortization of loan servicing right asset	1,289	867	934
Amortization of core deposit intangible	504	612	473
Amortization of debt issuance costs	179	178	178
Provision for loan losses	32,047	2,254	4,313
Deferred income tax (benefit)	(6,957)	197	3,785
Excess tax benefit related to share-based compensation	(86)	(565)	(484)
Origination of loans held for sale	(655,546)	(278,559)	(357,983)
Proceeds from sale of loans held for sale	631,572	285,116	378,469
Loss (gain) on sale of loans held for investment	2,003	0	(226)
Gain on sale of loans held for sale	(9,217)	(6,286)	(6,779)
(Gain) loss on sale of available for sale securities	(2,043)	4,160	(896)
Income from bank owned life insurance	(1,487)	(1,535)	(818)
(Gain) loss on sale of foreclosed assets	0	(81)	20
Stock-based compensation	5,917	6,569	2,802
Recognition of deferred gain on sale of loans	(15)	(15)	(58)
Recognition of deferred gain on sale of foreclosed assets	(14)	(10)	(14)
Net change in:
Accrued interest receivable and other assets	6,597	(8,212)	(9,536)
Accrued interest payable and other liabilities	(3,730)	2,638	2,826
Net cash from operating activities	23,811	50,307	55,638
Available for sale securities:
Sales	582,950	176,016	240,175
Purchases	(208,661)	(474,163)	(664,894)
Maturities, prepayments and calls	145,203	359,859	175,457
Held to maturity securities:
Purchases	(4,909)	(3,347)	(4,266)
Maturities, prepayments and calls	8,116	11,999	16,326
Net change in loans	228,259	311,118	487,060
Proceeds from sale of loans held for investment	76,849	0	0
Purchase of bank owned life insurance	0	(119)	(25,000)
Purchase of restricted equity securities	(2,971)	(2,463)	(6,649)
Proceeds from sale of foreclosed assets	0	1,934	1,330
Purchases of premises and equipment, net	(1,569)	(2,551)	(3,212)
Decrease (increase) in certificates of deposits at other financial institutions	4	(239)	(1,800)
Net cash acquired from acquisition (See Note 2)	0	24,660	0
Capitalization of foreclosed assets	0	0	(35)
Net cash from investing activities	366,753	(219,532)	(759,628)
Cash flows from financing activities
(Decrease) Increase in deposits	(224,223)	141,417	775,410
Increase (decrease) in federal funds purchased and repurchase agreements	0	(31,004)	(52,297)
Proceeds from Federal Home Loan Bank advances	525,000	450,000	380,000
Repayment of Federal Home Loan Bank advances	(738,500)	(365,000)	(240,000)
Proceeds from exercise of common stock warrants	0	0	150
Proceeds from exercise of common stock options	5,307	3,047	1,615
Proceeds from issuance of common stock, net of offering costs	0	(242)	0
Divestment of stock issued to 401(k) plan	0	(308)	(256)
Purchase of treasury stock	(717)	0	0
Noncontrolling interest distributions	(2,636)	0	0
Noncontrolling interest distributions	(16)	(16)	(16)
Net cash from financing activities	(435,785)	197,894	864,606
Net change in cash and cash equivalents	(45,221)	28,669	160,616
Cash and cash equivalents at beginning of period	280,212	251,543	90,927
Cash and cash equivalents at end of period	234,991	280,212	251,543
Supplemental information:
Interest paid	74,031	63,847	34,562
Income taxes paid	9,994	10,892	15,680
Non-cash supplemental information:
Fair value of stock and stock options issued related to Civic Bank acquisition (See FN 2)	0	33,174	0
Transfers from loans to foreclosed assets	0	350	2,818
Transfers from Held to Maturity to Available for Sale	116,203	$ 83,501	$ 0
Establishment of lease liability and right of use asset	$ 43,723