REGULATORY CAPITAL AND OTHER REGULATORY MATTERS (Details Textual) (USD $)	6 Months Ended		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Mar. 31, 2014 Parent Company [Member]	Mar. 31, 2014 Subordinated Debt [Member]
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
Net deferred tax assets attributable to net operating loss and tax credit carryforwards as a percentage of total net deferred tax assets	88.00%