SUBORDINATED DEBENTURES (Details Textual) (USD $)	3 Months Ended		6 Months Ended						3 Months Ended
	Jun. 30, 2014 trust	Jun. 30, 2013	Jun. 30, 2014 trust installment	Jun. 30, 2013	Dec. 31, 2013 installment	Aug. 10, 2009	Dec. 31, 2013 Regularly Scheduled Deferred Interest Payments Accrued [Member]	Dec. 31, 2013 Additional Deferred Interest Payments Accrued [Member]	Mar. 31, 2014 Parent Company [Member]	Mar. 31, 2014 Subordinated Debt [Member]
Debt Instrument [Line Items]
Number of trusts created for issuing trust preferred securities	13		13
Distributions accrued on junior subordinated debentures	$ 3,000,000	$ 3,700,000	$ 6,800,000	$ 7,400,000
Trust Preferred Securities						345,000,000
Number of quarterly periods for deferral of cash interest payments on junior subordinated debentures					18
Interest payable							56,000,000	6,700,000
Cash dividends paid by First Bank to First Banks, Inc.									70,000,000
Interest paid on junior subordinated debentures in March 2014			$ 73,470,000	$ 5,056,000						$ 66,400,000