Regulatory Capital (Tables)

12 Months Ended

Dec. 31, 2012

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

The Company’s actual capital amounts and ratios and selected minimum regulatory thresholds and prompt corrective action provisions as of December 31, 2012 and 2011 are presented in the following table:

	Actual				Adequately Capitalized				Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2012
Total risk-based capital:
Consolidated	$	748,431	15.6	%	$	384,014	8.0	%	NA		NA
FIB	697,695		14.6		382,245		8.0		$	477,806	10.0	%
Tier 1 risk-based capital:
Consolidated	652,929		13.6		192,007		4.0		NA		NA
FIB	622,466		13.0		191,122		4.0		$	286,683	6.0
Leverage capital ratio:
Consolidated	652,929		8.8		296,559		4.0		NA		NA
FIB	622,466		8.4		296,061		4.0		$	370,077	5.0

	Actual				Adequately Capitalized				Well Capitalized
	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2011
Total risk-based capital:
Consolidated	$	800,354	16.5	%	$	387,082	8.0	%	NA		NA
FIB	663,860		13.8		384,987		8.0		$	481,234	10.0	%
Tier 1 risk-based capital:
Consolidated	704,229		14.6		193,541		4.0		NA		NA
FIB	588,059		12.2		192,494		4.0		$	288,740	6.0
Leverage capital ratio:
Consolidated	704,229		9.8		286,303		4.0		NA		NA
FIB	588,059		8.2		285,358		4.0		$	356,698	5.0