Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income	$ 4,945,000	$ 2,433,000	$ 2,442,000
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,557,000	500,000	900,000
Loss on sale of other real estate owned			9,000
Write down of other real estate owned	355,000	3,069,000	1,138,000
Depreciation and amortization	3,518,000	3,080,000	2,382,000
Deferred income taxes	(380,000)	(84,000)	(142,000)
Stock based compensation	759,000	600,000	420,000
Gain on sale of investment securities	(656,000)	(108,000)	(458,000)
Impairment charges on investment securities	7,000	3,000	7,000
Amortization of premiums on investment securities	1,980,000	840,000	540,000
Accretion of discounts on retained SBA loans	(1,364,000)	(1,005,000)	(899,000)
Fair value adjustments on SBA servicing assets	1,075,000	14,000	655,000
Proceeds from sales of SBA loans originated for sale	58,107,000	32,922,000	51,388,000
SBA loans originated for sale	(53,627,000)	(31,760,000)	(43,416,000)
Gains on sales of SBA loans originated for sale	(4,981,000)	(3,139,000)	(4,717,000)
Proceeds from sales of mortgage loans originated for sale	163,414,000
Mortgage loans originated for sale	(161,717,000)
Gains on mortgage loans originated for sale	(4,737,000)
Amortization of intangible assets	43,000
Amortization of debt issuance costs	24,000	24,000	24,000
Increase in accrued interest receivable and other assets	(1,993,000)	(2,966,000)	(1,796,000)
Net (decrease) increase in accrued interest payable and other liabilities	(1,040,000)	213,000	325,000
Net cash provided by operating activities	5,289,000	4,636,000	8,802,000
Cash flows from investing activities
Purchase of investment securities available for sale	(207,482,000)	(146,668,000)	(78,825,000)
Purchase of investment securities held to maturity	(294,187,000)	(121,402,000)
Proceeds from the sale of securities available for sale	78,585,000	11,707,000	5,700,000
Proceeds from the paydowns, maturity or call of securities available for sale	36,982,000	31,159,000	25,822,000
Proceeds from the paydowns, maturity or call of securities held to maturity	33,160,000	16,689,000	2,308,000
Net redemption (purchase) of restricted stock	1,693,000	(1,902,000)	413,000
Net increase in loans	(89,428,000)	(106,616,000)	(104,357,000)
Net proceeds from sale of other real estate owned	1,400,000	792,000	197,000
Net cash paid in acquisition	(5,913,000)
Premises and equipment expenditures	(14,291,000)	(14,214,000)	(14,664,000)
Net cash used in investing activities	(459,481,000)	(330,455,000)	(163,406,000)
Cash flows from financing activities
Net proceeds from stock offering	99,175,000		44,853,000
Net proceeds from exercise of stock options	726,157	64,624	975
Net increase in demand, money market and savings deposits	384,786,000	184,859,000	206,163,000
Net increase (decrease) in time deposits	43,586,000	(7,791,000)	(3,467,000)
(Repayment) increase in short-term borrowings	(66,666,000)	47,000,000
Net cash provided by financing activities	461,607,000	224,132,000	247,550,000
Net increase (decrease) in cash and cash equivalents	7,415,000	(101,687,000)	92,946,000
Cash and cash equivalents, beginning of year	27,139,000	128,826,000	35,880,000
Cash and cash equivalents, end of year	34,554,000	27,139,000	128,826,000
Supplemental disclosures
Interest paid	6,664,000	5,401,000	4,616,000
Income taxes paid	190,000		70,000
Non-cash transfers from loans to other real estate owned	616,000	11,459,000	1,000,000
Transfer of available-for-sale-securities to held-to-maturity securities			$ 70,118,000