CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance at Dec. 31, 2016		$ 112,757	$ 7,102	$ 81,499	$ 26,227	$ (2,071)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common stock issued in offering, net of direct costs of $1,991		32,509	1,624	30,885
Surrendered shares		(166)	(8)	(158)
Shares repurchased		(264)	(12)	(252)
Options and warrants exercised		889	67	822
Dividends declared		(637)			(637)
Stock-based compensation and other activity		587	(68)	655
Net tax effect of stock-based compensation		7		7
Net income		5,918			5,918
Other comprehensive income (loss), net		1,276				1,276
Ending Balance at Sep. 30, 2017		152,876	8,705	113,458	31,508	(795)
Beginning Balance at Jun. 30, 2017						(909)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income		2,131
Other comprehensive income (loss), net		114				114
Ending Balance at Sep. 30, 2017		152,876	8,705	113,458	31,508	(795)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Reclassification of tax effects of the Tax Cuts and Jobs Act		300
Ending Balance at Dec. 31, 2017		172,729	9,515	131,582	33,203	(1,571)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Surrendered shares		(221)	(9)	(212)
Shares repurchased		(1,833)	(71)	(1,762)
Options and warrants exercised		1,037	77	960
Dividends declared		(1,156)			(1,156)
Stock-based compensation and other activity		799	34	765
Reclassification of tax effects of the Tax Cuts and Jobs Act	[1]	557			557
Net income		10,269			10,269
Other comprehensive income (loss), net		(3,769)				(3,769)
Ending Balance at Sep. 30, 2018		178,407	9,546	131,333	42,868	(5,340)
Beginning Balance at Jun. 30, 2018						(3,775)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Net income		4,047
Other comprehensive income (loss), net		(1,565)				(1,565)
Ending Balance at Sep. 30, 2018		178,407	$ 9,546	$ 131,333	42,868	$ (5,340)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Impact of adoption of new accounting standards	[2]	$ (5)			$ (5)

[1] The Tax Cuts and Jobs Act, enacted on December 22, 2017, required the revaluation of the Company’s deferred tax assets and liabilities as of December 31, 2017 as a result of the lower corporate tax rates to be realized beginning January 1, 2018. The $0.6 million adjustment to retained earnings for the period ended September 30, 2018 represents a reclassification of the tax effects of the Tax Cuts and Jobs Act.

[2] Represents the impact of adopting Accounting Standards Update (“ASU”) No. 2016-01. See Note 1 to the consolidated financial statements for more information.