Unaudited Condensed Consolidated Statements of Changes in Shareholders' Equity - USD ($) shares in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2014		7,489
Balance at Dec. 31, 2014	$ 10,000,000	$ 936,000	$ 51,344,000	$ 105,774,000	$ 4,875,000	$ 172,929,000
Net income				7,576,000		7,576,000
Other comprehensive income					(2,460,000)	(2,460,000)
Shares issued under director compensation plan (in shares)		2
Shares issued under director compensation plan			45,000			45,000
Shares issued pursuant to employee stock purchase plan (in shares)		4
Shares issued pursuant to employee stock purchase plan		$ 1,000	65,000			66,000
Expense related to employee stock purchase plan			16,000			16,000
Balance (in shares) at Jun. 30, 2015		7,495
Balance at Jun. 30, 2015		$ 937,000	51,470,000	112,955,000	2,415,000	167,777,000
Cash dividends declared – preferred				(395,000)		(395,000)
Redemption of preferred stock	$ (10,000,000)					(10,000,000)
Balance (in shares) at Dec. 31, 2015		7,500
Balance at Dec. 31, 2015		$ 937,000	51,608,000	120,371,000	2,782,000	175,698,000
Net income				9,736,000		9,736,000
Other comprehensive income					4,315,000	4,315,000
Cash dividends declared – common				(1,050,000)		(1,050,000)
Shares issued under director compensation plan (in shares)		1
Shares issued under director compensation plan			36,000			36,000
Shares issued pursuant to employee stock purchase plan (in shares)		3
Shares issued pursuant to employee stock purchase plan		$ 1,000	73,000			74,000
Expense related to employee stock purchase plan			17,000			17,000
Balance (in shares) at Jun. 30, 2016		7,504
Balance at Jun. 30, 2016		$ 938,000	$ 51,734,000	$ 129,057,000	$ 7,097,000	$ 188,826,000