Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2013	$ 29,988	$ 935	$ 51,102	$ 91,242	$ (3,212)	$ 170,055
Balance (in shares) at Dec. 31, 2013		7,479,000
Net income				16,459		16,459
Other comprehensive income					8,087	8,087
Cash dividends declared – preferred				(1,915)		(1,915)
Preferred stock discount accretion	12			(12)
Redemption of preferred stock	(20,000)					(20,000)
Shares issued under director compensation plan			82			82
Shares issued under director compensation plan (in shares)		3,000
Shares issued pursuant to employee stock purchase plan		$ 1	128			$ 129
Shares issued pursuant to employee stock purchase plan (in shares)		7,000				6,894
Expense related to employee stock purchase plan			32			$ 32
Balance at Dec. 31, 2014	10,000	$ 936	51,344	105,774	4,875	172,929
Balance (in shares) at Dec. 31, 2014		7,489,000
Net income				14,992		14,992
Other comprehensive income					(2,093)	(2,093)
Cash dividends declared – preferred				(395)		(395)
Redemption of preferred stock	(10,000)					(10,000)
Shares issued under director compensation plan			104			104
Shares issued under director compensation plan (in shares)		4,000
Shares issued pursuant to employee stock purchase plan		$ 1	129			$ 130
Shares issued pursuant to employee stock purchase plan (in shares)		7,000				6,329
Expense related to employee stock purchase plan			31			$ 31
Balance at Dec. 31, 2015		$ 937	51,608	120,371	2,782	175,698
Balance (in shares) at Dec. 31, 2015		7,500,000
Net income				16,605		16,605
Other comprehensive income					(6,190)	(6,190)
Shares issued under director compensation plan		$ 1	91			92
Shares issued under director compensation plan (in shares)		3,000
Shares issued pursuant to employee stock purchase plan		$ 1	154			$ 155
Shares issued pursuant to employee stock purchase plan (in shares)		6,000				6,631
Expense related to employee stock purchase plan			32			$ 32
Balance at Dec. 31, 2016		$ 939	51,885	134,650	(3,408)	184,066
Balance (in shares) at Dec. 31, 2016		7,509,000
Cash dividends declared – common, $.31 per share				$ (2,326)		$ (2,326)