CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 9,568	$ 7,123	$ 16,324	$ 13,961
Other comprehensive (loss) income:
Unrealized (losses) gains on available-for-sale investment securities, net of tax	(16,551)	5,152	(18,803)	11,870
Reclassification adjustment for available-for-sale investment securities (gains) losses included in net income, net of tax	(191)	3	(186)	(336)
Amortization of net unrealized gain associated with reclassification of available-for-sale investment securities to held-to-maturity investment securities, net of tax	(431)	0	(860)	0
Amortization of net loss related to pension liability, net of tax	30	21	60	42
Reclassification adjustment for deferred tax asset valuation allowance on investment securities	(13,769)	2,776	(15,915)	6,211
Reclassification adjustment for deferred tax asset valuation allowance on pension liability	24	16	48	31
Net current period other comprehensive income (loss)	(30,888)	7,968	(35,656)	17,818
Comprehensive (loss) income	(21,320)	15,091	(19,332)	31,779
Comprehensive income (loss) attributable to noncontrolling interest in subsidiary	105	(385)	151	(445)
Comprehensive (loss) income attributable to First Banks, Inc.	$ (21,425)	$ 15,476	$ (19,483)	$ 32,224