CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 12,369	$ 5,013	$ 4,269
Adjustments to reconcile net income to net cash:
Depreciation and amortization	978	785	696
Net amortization on securities	321	355	492
Amortization of subordinated debt issuance costs	46
Gain on sale of securities		(40)
Provision for loan losses	7,059	8,060	2,015
Net change in deferred loan fees	(90)	(15)	(1,006)
Deferred income tax benefit	790	(913)	(455)
Stock-based compensation expense	412	2,328	447
Net change in:
Accrued interest receivable	(1,686)	(434)	(628)
Accounts payable, accrued expenses and other liabilities	10,777	(1,215)	1,542
Change in debit card holder balances	2,018	6,635	(2,919)
Change in Accrued interest payable	522	(93)	(6)
Accounts receivable, net	(1,181)	(4,550)	245
Receivable from prepaid card programs, net	(2,013)	(187)	3,703
Prepaid expenses and other assets	1,151	(1,171)	(2,952)
Net cash provided by operating activities	31,473	14,558	5,443
Cash flows from investing activities:
Loan originations and payments, net	(377,118)	(240,420)	(184,597)
Proceeds from sales of loans	7,871
Redemptions of other investments	7,203
Purchases of other investments	(8,292)	(182)	(5,368)
Purchase of securities available for sale	(1,470)	(1,546)
Proceeds from sales and calls of securities available for sale		2,771
Proceeds from paydowns and maturities of securities available for sale	6,359	8,378	9,491
Purchase of securities held to maturity		(2,684)	(5,151)
Proceeds from paydowns of securities held to maturity	1,034	1,198	283
Purchase of premises and equipment, net	(2,211)	(1,180)	(1,732)
Net cash used in investing activities	(366,624)	(233,665)	(187,074)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	114,773	28,368	12,606
Proceeds from issuance of preferred stock, net		5,503
Purchase and retirement of treasury preferred stock		(1,400)
Proceeds from exercise of stock options	135
Redemption of common stock for exercise of stock options and tax withholdings for resticted stock vesting	(255)
Redemption of preferred stock, net		(2,672)
Payment of preferred stock dividend		(3,420)
Proceeds from issuance of subordinated debt, net of issuance cost	24,443
Proceeds from FHLB advances	326,864	120,000	97,426
Repayments of FHLB advances	(363,084)	(137,729)	(65,202)
Net increase in deposits	410,575	227,741	156,793
Net cash provided by financing activities	513,451	236,391	201,623
Increase in cash and cash equivalents	178,300	17,284	19,992
Cash and cash equivalents at the beginning of the year	82,931	65,647	45,655
Cash and cash equivalents at the end of the year	261,231	82,931	65,647
Cash paid during the year for:
Interest	8,149	6,182	5,025
Taxes	8,787	5,270	$ 3,265
Non-cash investing and financing activities:
Transfer of loans held for investment to held for sale	$ 7,871	$ 26,095