SUBSEQUENT EVENTS (Textual) (Details) (USD $)	12 Months Ended						1 Months Ended	3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Parent Company [Member]	Dec. 31, 2012 Parent Company [Member]	Dec. 31, 2011 Parent Company [Member]	Feb. 10, 2014 Parent Company [Member] Subsequent Event [Member]	Mar. 14, 2014 Junior Subordinated Debt [Member] Subsequent Event [Member]
Subsequent Event [Line Items]
Cash Dividends Paid to First Banks, Inc. by First Bank							$ 70,000,000
Deferred interest paid by First Banks, Inc. on the junior subordinated debentures to the respective trustees for further distribution to the trust preferred securities holders on the interest payment dates in March and April 2014	$ 9,540,000	$ 17,493,000	$ 35,723,000	$ 0	$ 0	$ 0		$ 66,400,000