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 at Dec. 31, 2014	$ 10,000,000	$ 936,000	$ 51,344,000	$ 105,774,000	$ 4,875,000	$ 172,929,000
Balance (in shares) at Dec. 31, 2014		7,489
Net income				11,408,000		11,408,000
Other comprehensive income					(545,000)	(545,000)
Shares issued under director compensation plan			64,000			64,000
Shares issued under director compensation plan (in shares)		3
Shares issued pursuant to employee stock purchase plan		$ 1,000	92,000			93,000
Shares issued pursuant to employee stock purchase plan (in shares)		5
Expense related to employee stock purchase plan			24,000			24,000
Balance at Sep. 30, 2015		$ 937,000	51,524,000	116,787,000	4,330,000	173,578,000
Balance (in shares) at Sep. 30, 2015		7,497
Cash dividends declared – preferred				(395,000)		(395,000)
Redemption of preferred stock	(10,000,000)					(10,000,000)
Balance at Dec. 31, 2015		$ 937,000	51,608,000	120,371,000	2,782,000	175,698,000
Balance (in shares) at Dec. 31, 2015		7,500
Net income				14,060,000		14,060,000
Other comprehensive income					339,000	339,000
Cash dividends declared – common				(1,575,000)		(1,575,000)
Shares issued under director compensation plan			62,000			62,000
Shares issued under director compensation plan (in shares)		2
Shares issued pursuant to employee stock purchase plan		$ 1,000	115,000			116,000
Shares issued pursuant to employee stock purchase plan (in shares)		5
Expense related to employee stock purchase plan			24,000			24,000
Balance at Sep. 30, 2016		$ 938,000	$ 51,809,000	$ 132,856,000	$ 3,121,000	$ 188,724,000
Balance (in shares) at Sep. 30, 2016		7,507