Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Total	Common stock	Retained earnings		Accumulated other comprehensive (loss)
Beginning Balance at Dec. 31, 2016		$ 106,291	$ 85,383	$ 20,748		$ 160
Beginning Balance (in shares) at Dec. 31, 2016			10,477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		6,636		6,636
Other comprehensive income (loss), net of tax		38				38
Dividends on common stock		(1,173)	$ 74	(1,247)
Common stock issued and related tax effects	[1]	655	$ 655
Common stock issued and related tax effects (in shares)	[1]		90
Ending Balance at Jun. 30, 2017		112,447	$ 86,112	26,137		198
Ending Balance (in shares) at Jun. 30, 2017			10,567
Beginning Balance at Mar. 31, 2017						134
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		3,444
Other comprehensive income (loss), net of tax		64
Ending Balance at Jun. 30, 2017		112,447	$ 86,112	26,137		198
Ending Balance (in shares) at Jun. 30, 2017			10,567
Beginning Balance at Dec. 31, 2017		$ 118,105	$ 86,782	31,117		206
Beginning Balance (in shares) at Dec. 31, 2017		10,615	10,615
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 10,627		10,627
Other comprehensive income (loss), net of tax		(171)				(171)
Dividends on common stock		(1,340)	$ 53	(1,393)
Common stock issued and related tax effects	[1]	920	$ 920
Common stock issued and related tax effects (in shares)	[1]		116
Ending Balance at Jun. 30, 2018		$ 128,141	$ 87,755	40,386		0
Ending Balance (in shares) at Jun. 30, 2018		10,731	10,731
Beginning Balance at Mar. 31, 2018						40
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 5,397
Other comprehensive income (loss), net of tax		(5)
Ending Balance at Jun. 30, 2018		$ 128,141	$ 87,755	40,386		0
Ending Balance (in shares) at Jun. 30, 2018		10,731	10,731
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of new accounting principle in period of adoption | ASU 2016-01		$ 40		(40)	[2]	40	[2]
Cumulative effect of new accounting principle in period of adoption | ASU 2018-02		$ 75		$ 75	[3]	$ (75)	[3]

[1] Includes the issuance of common stock under employee benefit plans, which includes nonqualified stock options and restricted stock expense related entries, employee option exercises and the tax benefit of options exercised

[2] As a result of ASU 2016-01, "Financial Instruments Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities", the Company reclassed $40 thousand of gains (losses) on available for sale equity securities sitting in accumulated other comprehensive income to retained earnings.

[3] As a result of ASU 2018-02, "Income Statement - Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income", the Company reclassed $75 thousand from accumulated other comprehensive income to retained earnings.