CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income		$ 6,291	$ 2,548
Adjustments to reconcile net income to net cash:
Net depreciation amortization and accretion		368	197
Provision for loan losses		1,477	570
Net change in deferred loan fees		698	(104)
Proceeds from the sale of loans held for sale		11,895
Stock-based compensation expense		293	92
Net change in:
Accrued interest receivable		55	7
Accounts payable, accrued expenses and other liabilities		1,660	2,048
Debit cardholder balances		(2,067)	(242)
Accrued interest payable		(295)	208
Accounts receivable, net		4,927	2,544
Receivable from prepaid card programs, net		2,056	309
Prepaid expenses and other assets		(141)	702
Net cash provided by operating activities		27,217	8,879
Cash flows from investing activities:
Loan originations and payments, net		(118,967)	(42,782)
Redemptions of other investments		414	206
Purchases of other investments		(3,303)
Proceeds from paydowns and maturities of securities available for sale		1,408	1,678
Proceeds from paydowns of securities held to maturity		208	262
Purchase of premises and equipment, net		(716)	(629)
Net cash used in investing activities		(120,956)	(41,265)
Cash flows from financing activities:
Proceeds from issuance of common stock, net	[1]	(33)
Proceeds from issuance of subordinated debt, net of issuance cost			25,000
Proceeds from FHLB advances			60,000
Repayments of FHLB advances		(9,198)	(64,564)
Redemption of common stock for tax withholdings for restricted stock vesting		(72)
Net increase in deposits		212,761	22,897
Net cash provided by financing activities		203,458	43,333
Increase in cash and cash equivalents		109,719	10,947
Cash and cash equivalents at the beginning of the period		261,231	82,931
Cash and cash equivalents at the end of the period		370,950	93,878
Cash paid for:
Interest		2,472	1,430
Taxes		4,862	$ 907
Transfer of loans held for investment to held for sale		$ 11,895

[1] Represents costs incurred in connection with the Company's initial public offering completed in the prior period.