Borrowings and Borrowings Availability (Details Narrative) (USD $) In Thousands, unless otherwise specified					12 Months Ended						12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 First Bank Corp Capital Trust II	Dec. 31, 2012 First Bank Corp Capital Trust III	Dec. 31, 2012 FHLB Line of Credit	Dec. 31, 2011 FHLB Line of Credit	Dec. 31, 2012 Overnight Federal Funds Line of Credit	Dec. 31, 2011 Overnight Federal Funds Line of Credit	Dec. 31, 2012 FRB Line of Credit	Dec. 31, 2011 FRB Line of Credit	Dec. 31, 2011 Correspondent Bank Line of Credit
Borrowings	$ 46,394	$ 133,925	$ 10,300	$ 10,300
Line of credit, borrowing capacity					372,000		50,000		88,000		10,000
Line of credit, outstanding					0	88,000	0	0	0	0
Line of credit, amount repaid					65,000
Line of credit, prepayment penalties					500
Line of credit, amount reduced					143,000	203,000
Line of credit, amount unused					$ 229,000
Line of credit, percent secured by common stock											100.00%