CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (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, beginning of period at Dec. 31, 2011	$ 263,671	$ 318,609	$ 5,915	$ 12,480	$ (183,351)	$ 16,066	$ 93,952
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	25,981				26,278		(297)
Other comprehensive income (loss)	29,193					29,193
Accretion of discount on preferred stock		3,554			(3,554)
Preferred stock dividends declared	(18,886)				(18,886)
Balance, end of period 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	241,923				241,744		179
Other comprehensive income (loss)	(37,757)					(37,757)
Accretion of discount on preferred stock		3,643			(3,643)
Preferred stock dividends declared	(15,869)				(15,869)
Balance, end of period 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	21,579				21,655		(76)
Other comprehensive income (loss)	2,609					2,609
Balance, end of period at Dec. 31, 2014	$ 512,444	$ 325,806	$ 5,915	$ 12,480	$ 64,374	$ 10,111	$ 93,758