BUSINESS SEGMENT RESULTS (Tables)

3 Months Ended

Mar. 31, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The business segment results are consistent with the Company’s internal reporting system and, in all material respects, with GAAP and practices predominant in the banking industry. The business segment results are summarized as follows:

	First Bank			Corporate, Other and Intercompany Reclassifications				ConsolidatedTotals
	March 31, 2013		December 31, 2012	March 31, 2013		December 31, 2012		March 31, 2013	December 31, 2012
	(dollars expressed in thousands)
Balance sheet information:
Investment securities	$	2,661,541	2,675,280	—		—		2,661,541	2,675,280
Total loans	2,844,331		2,930,747	—		—		2,844,331	2,930,747
FRB and FHLB stock	27,624		27,329	—		—		27,624	27,329
Goodwill	125,267		125,267	—		—		125,267	125,267
Assets of discontinued operations	6,540		6,706	—		—		6,540	6,706
Total assets	6,383,172		6,495,226	14,563		13,900		6,397,735	6,509,126
Deposits	5,386,969		5,495,624	(2,512	)	(2,777	)	5,384,457	5,492,847
Other borrowings	36,855		26,025	—		—		36,855	26,025
Subordinated debentures	—		—	354,153		354,133		354,153	354,133
Liabilities of discontinued operations	136,146		155,711	—		—		136,146	155,711
Stockholders’ equity	757,206		751,252	(460,140	)	(451,293	)	297,066	299,959

	First Bank					Corporate, Other and Intercompany Reclassifications				Consolidated Totals
	Three Months Ended					Three Months Ended				Three Months Ended
	March 31,					March 31,				March 31,
	2013			2012		2013		2012		2013		2012
	(dollars expressed in thousands)
Income statement information:
Interest income	$	44,351		52,320		—		21		44,351		52,341
Interest expense	2,561			4,602		3,676		3,683		6,237		8,285
Net interest income (loss)	41,790			47,718		(3,676	)	(3,662	)	38,114		44,056
Provision for loan losses	—			2,000		—		—		—		2,000
Net interest income (loss) after provision for loan losses	41,790			45,718		(3,676	)	(3,662	)	38,114		42,056
Noninterest income	15,351			17,032		111		72		15,462		17,104
Noninterest expense	44,948			50,405		184		341		45,132		50,746
Income (loss) from continuing operations before provision (benefit) for income taxes	12,193			12,345		(3,749	)	(3,931	)	8,444		8,414
Provision (benefit) for income taxes	148			132		217		(37	)	365		95
Net income (loss) from continuing operations, net of tax	12,045			12,213		(3,966	)	(3,894	)	8,079		8,319
Loss from discontinued operations, net of tax	(1,323		)	(1,481	)	—		—		(1,323	)	(1,481	)
Net income (loss)	10,722			10,732		(3,966	)	(3,894	)	6,756		6,838
Net income (loss) attributable to noncontrolling interest in subsidiary	46			(60	)	—		—		46		(60	)
Net income (loss) attributable to First Banks, Inc.	$	10,676		10,792		(3,966	)	(3,894	)	6,710		6,898