Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) (USD $)	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2012	$ 0	$ 166,074,000	$ (21,134,000)	$ 1,650,000	$ 146,590,000
Employee stock purchase plan (1,098 shares)		19,000			19,000
Dividend reinvestment plan (1,954 shares)		33,000			33,000
Stock-based compensation expense		236,000			236,000
Cash dividends		(1,814,000)			(1,814,000)
Net income			8,416,000		8,416,000
Change in net unrealized holding gain on securities available for sale, net of tax effect				(3,113,000)	(3,113,000)
Change in fair value of interest rate swap, net of tax effect				571,000	571,000
Balances at Jun. 30, 2013	0	164,548,000	(12,718,000)	(892,000)	150,938,000
Balances at Dec. 31, 2013	0	162,999,000	(4,101,000)	(5,573,000)	153,325,000
Stock option exercises (5,920 shares)		75,000			75,000
Stock grants to directors for retainer fees (7,375 shares)		155,000			155,000
Stock-based compensation expense		351,000			351,000
Cash dividends		(20,102,000)	(315,000)		(20,417,000)
Common stock issued in connection with Firstbank merger (8,087,272 shares)		173,310,000			173,310,000
Stock options issued to replace existing Firstbank options at merger date		1,664,000			1,664,000
Net income			5,089,000		5,089,000
Change in net unrealized holding gain on securities available for sale, net of tax effect				2,667,000	2,667,000
Change in fair value of interest rate swap, net of tax effect				(81,000)	(81,000)
Balances at Jun. 30, 2014	$ 0	$ 318,452,000	$ 673,000	$ (2,987,000)	$ 316,138,000