Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Ending balance at Jun. 30, 2016	$ 938	$ 51,734	$ 129,057	$ 7,097	$ 188,826
Balance (in shares) at Dec. 31, 2015	7,500
Beginning balance at Dec. 31, 2015	$ 937	51,608	120,371	2,782	175,698
Net income			9,736		9,736
Other comprehensive income				4,315	4,315
Cash dividends declared – common			(1,050)		(1,050)
Shares issued under director compensation plan (in shares)	1
Shares issued under director compensation plan		36			36
Shares issued pursuant to employee stock purchase plan (in shares)	3
Shares issued pursuant to employee stock purchase plan	$ 1	73			74
Expense related to employee stock purchase plan		17			17
Balance (in shares) at Jun. 30, 2016	7,504
Ending balance at Jun. 30, 2016	$ 938	51,734	129,057	7,097	188,826
Beginning balance at Mar. 31, 2016				5,424
Net income					3,556
Other comprehensive income				1,673	1,673
Balance (in shares) at Jun. 30, 2016	7,504
Ending balance at Jun. 30, 2017	$ 939	52,034	140,959	(1,056)	192,876
Balance (in shares) at Dec. 31, 2016	7,509
Beginning balance at Dec. 31, 2016	$ 939	51,885	134,650	(3,408)	184,066
Net income			7,811		7,811
Other comprehensive income				2,352	2,352
Cash dividends declared – common			(1,502)		(1,502)
Shares issued under director compensation plan (in shares)	1
Shares issued under director compensation plan		46			46
Shares issued pursuant to employee stock purchase plan (in shares)	3
Shares issued pursuant to employee stock purchase plan		87			87
Expense related to employee stock purchase plan		16			16
Balance (in shares) at Jun. 30, 2017	7,513
Ending balance at Jun. 30, 2017	$ 939	$ 52,034	$ 140,959	(1,056)	192,876
Beginning balance at Mar. 31, 2017				(2,395)
Net income					4,482
Other comprehensive income				$ 1,339	$ 1,339
Balance (in shares) at Jun. 30, 2017	7,513