REGULATORY CAPITAL AND OTHER REGULATORY MATTERS (Tables)

12 Months Ended

Dec. 31, 2012

Banking and Thrift [Abstract]

Schedule of required and actual capital ratios

At December 31, 2012 and 2011, the Company and First Bank’s required and actual capital ratios were as follows:

	Actual								For Capital Adequacy Purposes	To be Well Capitalized Under Prompt Corrective Action Provisions
	2012				2011
	Amount		Ratio		Amount		Ratio
	(dollars expressed in thousands)
Total capital (to risk-weighted assets):
First Banks, Inc.	$	93,542	2.57	%	$	73,830	1.88	%	8.0%	N/A
First Bank	626,177		17.18		588,860		14.98		8.0	10.0%
Tier 1 capital (to risk-weighted assets):
First Banks, Inc.	46,771		1.28		36,915		0.94		4.0	N/A
First Bank	580,026		15.92		538,592		13.70		4.0	6.0
Tier 1 capital (to average assets):
First Banks, Inc.	46,771		0.73		36,915		0.56		4.0	N/A
First Bank	580,026		9.13		538,592		8.19		4.0	5.0