Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities
Net income	$ 8,905,000	$ 4,945,000	$ 2,433,000
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Provision for loan losses	900,000	1,557,000	500,000
Write down of other real estate owned	3,000,000	355,000	3,069,000
Depreciation and amortization	4,618,000	3,518,000	3,080,000
Deferred income taxes	(5,056,000)	(380,000)	(84,000)
Stock based compensation	1,842,000	759,000	600,000
Loss (gain) on sale of investment securities	146,000	(656,000)	(108,000)
Impairment charges on investment securities	0	7,000	3,000
Amortization of premiums on investment securities	2,469,000	1,980,000	840,000
Accretion of discounts on retained SBA loans	(1,088,000)	(1,364,000)	(1,005,000)
Fair value adjustments on SBA servicing assets	1,187,000	1,075,000	14,000
Proceeds from sales of SBA loans originated for sale	42,269,000	58,107,000	32,922,000
SBA loans originated for sale	(37,062,000)	(53,627,000)	(31,760,000)
Gains on sales of SBA loans originated for sale	(3,378,000)	(4,981,000)	(3,139,000)
Proceeds from sales of mortgage loans originated for sale	311,187,000	163,414,000
Mortgage loans originated for sale	(321,222,000)	(161,717,000)
Fair value adjustment for mortgage loans originated for sale	(846,000)	(483,000)
Gains on mortgage loans originated for sale	(8,128,000)	(3,712,000)
Amortization of intangible assets	61,000	43,000
Amortization of debt issuance costs	29,000	24,000	24,000
Increase in accrued interest receivable and other assets	(2,330,000)	(2,729,000)	(2,966,000)
Net increase (decrease) in accrued interest payable and other liabilities	1,513,000	(846,000)	213,000
Net cash (used in) provided by operating activities	(984,000)	5,289,000	4,636,000
Cash flows from investing activities
Purchase of investment securities available for sale	(165,065,000)	(207,482,000)	(146,668,000)
Purchase of investment securities held to maturity	(89,350,000)	(294,187,000)	(121,402,000)
Proceeds from the sale of securities available for sale	31,197,000	78,585,000	11,707,000
Proceeds from the paydowns, maturity or call of securities available for sale	48,547,000	36,982,000	31,159,000
Proceeds from the paydowns, maturity or call of securities held to maturity	37,315,000	33,160,000	16,689,000
Net (purchase) redemption of restricted stock	(552,000)	1,693,000	(1,902,000)
Net increase in loans	(197,965,000)	(89,428,000)	(106,616,000)
Net proceeds from sale of other real estate owned	499,000	1,400,000	792,000
Net cash paid in acquisition		(5,913,000)
Premises and equipment expenditures	(22,525,000)	(14,291,000)	(14,214,000)
Net cash used in investing activities	(357,899,000)	(459,481,000)	(330,455,000)
Cash flows from financing activities
Net proceeds from stock offering		99,175,000
Net proceeds from exercise of stock options	646,263	726,157	64,624
Net increase in demand, money market and savings deposits	380,052,000	384,786,000	184,859,000
Net increase (decrease) in time deposits	5,573,000	43,586,000	(7,791,000)
(Repayment) increase in short-term borrowings		(66,666,000)	47,000,000
Net cash provided by financing activities	386,271,000	461,607,000	224,132,000
Net increase (decrease) in cash and cash equivalents	27,388,000	7,415,000	(101,687,000)
Cash and cash equivalents, beginning of year	34,554,000	27,139,000	128,826,000
Cash and cash equivalents, end of year	61,942,000	34,554,000	27,139,000
Supplemental disclosures
Interest paid	8,935,000	6,664,000	5,401,000
Income taxes paid	75,000	190,000
Non-cash transfers from loans to other real estate owned	291,000	616,000	11,459,000
Conversion of subordinated debt to common stock	$ 229,000