SUBORDINATED DEBENTURES (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2014 trust installment	Mar. 31, 2013	Dec. 31, 2013 installment	Aug. 10, 2009
Debt Instrument [Line Items]
Number Of Trusts Created For Issuing Trust Preferred Securities	13
Distributions Accrued On Junior Subordinated Debentures	$ 3,800,000	$ 3,700,000
Trust Preferred Securities				345,000,000
Number Of Quarterly Periods For Deferral Of Cash Interest Payments On Junior Subordinated Debt			18
Interest Paid	68,534,000	2,644,000
Regularly Scheduled Deferred Interest Payments Accrued [Member]
Debt Instrument [Line Items]
Interest Payable			56,000,000
Additional Deferred Interest Payments Accrued [Member]
Debt Instrument [Line Items]
Interest Payable			6,700,000
Parent Company [Member]
Debt Instrument [Line Items]
Cash dividends paid by First Bank to First Banks, Inc.	70,000,000
Subordinated Debt [Member]
Debt Instrument [Line Items]
Interest Paid	$ 66,400,000