Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net income	$ 25,239	$ 21,900	$ 15,226
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Amortization of operating lease right-of-use assets	729	0	0
Depreciation and amortization	6,926	5,667	5,299
Write-down of other real estate owned	0	2,423	0
Increase in cash surrender value of bank-owned life insurance	(943)	(954)	(910)
Provision for loan losses	5,966	3,892	4,872
Share-based compensation expense	1,680	1,596	1,038
Loss from sale of available-for-sale securities	458	0	8
Loans originated for sale	(627,597)	(364,630)	(412,925)
Proceeds from sale of loans originated for sale	601,215	376,535	425,262
Gain on sale of loans	(12,349)	(6,605)	(8,170)
Increase in fair value of loans held-for-sale	(538)	(57)	(638)
(Gain) loss on derivatives	(671)	501	577
Net change in servicing assets	(2,481)	0	0
Deferred income tax	(4,402)	978	(3,296)
Net change in other assets	(42,079)	(11,807)	(2,273)
Net change in other liabilities	5,270	(83)	554
Net cash (used in) provided by operating activities	(43,577)	29,356	24,624
Investing activities
Net loan activity, excluding sales and purchases	(191,070)	(463,528)	(870,181)
Net change in interest-bearing deposits	0	0	250
Purchase of bank owned life insurance	0	0	(10,000)
Proceeds from sales of other real estate owned	554	332	30
Net proceeds from sales of portfolio loans	293,708	41,916	67,696
Maturities of securities available-for-sale	92,610	62,507	68,342
Proceeds from sales of securities available-for-sale	30,137	0	9,192
Purchase of securities available-for-sale	(171,997)	(87,993)	(91,463)
Purchase of securities held-to-maturity	(39,208)	(3,554)	(2,550)
Purchase of Federal Home Loan Bank of Indianapolis stock	(2,025)	(4,050)	(10,665)
Purchase of premises and equipment	(4,105)	(2,219)	(1,517)
Loans purchased	(332,945)	(171,958)	(67,285)
Other investing activities	11,068	(10,166)	0
Net cash used in investing activities	(313,273)	(638,713)	(908,151)
Financing activities
Net increase in deposits	482,612	586,410	622,074
Cash dividends paid	(2,418)	(2,230)	(1,675)
Net proceeds from issuance of subordinated debt	35,418	0	0
Repayment of subordinated debt	0	(3,000)	0
Net proceeds from common stock issuance	0	54,334	51,636
Repurchase of common stock	(9,784)	(216)	0
Proceeds from advances from Federal Home Loan Bank	595,000	375,000	542,000
Repayment of advances from Federal Home Loan Bank	(605,000)	(260,000)	(321,806)
Other, net	(329)	(210)	(173)
Net cash provided by financing activities	495,499	750,088	892,056
Net increase in cash and cash equivalents	138,649	140,731	8,529
Cash and cash equivalents, beginning of year	188,712	47,981	39,452
Cash and cash equivalents, end of year	327,361	188,712	47,981
Supplemental disclosures of cash flows information
Initial recognition of right-of-use asset	2,096	0	0
Initial recognition of operating lease liabilities	2,096	0	0
Cash paid during the year for interest	81,788	52,403	30,516
Cash paid during the year for taxes	4,561	485	6,568
Loans transferred to other real estate owned	0	227	648
Loans transferred to held-for-sale from portfolio	291,152	16,065	95,531
Cash dividends declared, not paid	585	611	504
Transfer of mutual fund securities to other assets	$ 0	$ 2,932	$ 0