CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Total	First Banks, Inc. Stockholders’ Equity, Preferred Stock [Member]	First Banks, Inc. Stockholders’ Equity, Common Stock [Member]	First Banks, Inc. Stockholders’ Equity, Additional Paid-In Capital [Member]	First Banks, Inc. Stockholders’ Equity, Retained Earnings (Deficit) [Member]	First Banks, Inc. Stockholders’ Equity, Accumulated Other Comprehensive Income [Member]	Noncontrolling Interest [Member]
Balance at Dec. 31, 2012	$ 299,959	$ 322,163	$ 5,915	$ 12,480	$ (179,513)	$ 45,259	$ 93,655
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,756				6,710		46
Other comprehensive income (loss)	(4,768)					(4,768)
Accretion of discount on preferred stock	0	898			(898)
Preferred stock dividends declared	(4,881)				(4,881)
Balance at Mar. 31, 2013	297,066	323,061	5,915	12,480	(178,582)	40,491	93,701
Balance at Dec. 31, 2013	488,256	325,806	5,915	12,480	42,719	7,502	93,834
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,350				5,405		(55)
Other comprehensive income (loss)	3,700					3,700
Balance at Mar. 31, 2014	$ 497,306	$ 325,806	$ 5,915	$ 12,480	$ 48,124	$ 11,202	$ 93,779