Firstbank Corporation Consolidated Statements of Changes in Shareholders’ Equity (USD $) In Thousands	Common Stock [Member]	Preferred Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2010	$ 115,224	$ 32,763	$ 295	$ 146	$ 148,428
Net income			5,623		5,623
Cash dividends on common stock			(313)		(313)
Accrued dividends on preferred stock and		29	(1,679)		(1,650)
Amortization of stock warrants	(29)		29		0
Issuance of shares of common stock through the dividend reinvestment plan	62				62
Issuance of shares of common stock from supplemental shareholder investments	197				197
Issuance of shares of common stock	162				162
Stock option and restricted stock expense	118				118
Net change in unrealized gain/(loss) on securities available for sale, net of tax				2,750	2,750
Balances at Dec. 31, 2011	115,734	32,792	3,955	2,896	155,377
Net income			4,821		4,821
Cash dividends on common stock			(554)		(554)
Accrued dividends on preferred stock and		15	(840)		(825)
Redemption of 16,000 shares of preferred stock	850	(15,906)			(15,056)
Amortization of stock warrants	(15)		15		0
Issuance of shares of common stock through the dividend reinvestment plan	109				109
Issuance of shares of common stock from supplemental shareholder investments	13				13
Issuance of shares of common stock	351				351
Stock option and restricted stock expense	45				45
Net change in unrealized gain/(loss) on securities available for sale, net of tax				862	862
Balances at Jun. 30, 2012	$ 117,087	$ 16,901	$ 7,397	$ 3,758	$ 145,143