Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 2018

Banking and Thrift [Abstract]

Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations

Actual capital amounts and ratios for the Company and its subsidiary Banks, as of September 30, 2018 and December 31, 2017 are presented in the following tables:

	Actual				Adequately Capitalized  Basel III Phase-In Schedule				Adequately Capitalized Basel III Fully Phased-In				Well Capitalized (1)
September 30, 2018	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Total risk-based capital:
Consolidated	$	1,254.8	12.76	%	$	971.1	9.875	%	$	1,032.6	10.50	%	$	983.4	10.00	%
FIB	1,107.7		12.28		890.5		9.875		946.9		10.50		901.8		10.00
INB	77.6		9.86		77.7		9.875		82.7		10.50		78.7		10.00
Tier 1 risk-based capital:
Consolidated	1,181.2		12.01		774.5		7.875		835.9		8.50		786.7		8.00
FIB	1,034.0		11.47		710.2		7.875		766.5		8.50		721.5		8.00
INB	77.6		9.86		62.0		7.875		66.9		8.50		63.0		8.00
Common equity tier 1 risk-based capital:
Consolidated	1,096.8		11.15		626.9		6.375		688.4		7.00		639.2		6.50
FIB	1,034.0		11.47		574.9		6.375		631.3		7.00		586.2		6.50
INB	77.6		9.86		50.2		6.375		55.1		7.00		51.2		6.50
Leverage capital ratio:
Consolidated	1,181.2		9.73		485.6		4.000		485.6		4.00		607.0		5.00
FIB	1,034.0		8.77		471.8		4.000		471.8		4.00		589.7		5.00
INB	77.6		9.81		31.7		4.000		31.7		4.00		39.6		5.00

	Actual				Adequately Capitalized  Basel III Phase-In Schedule				Adequately Capitalized Basel III Fully Phased-In				Well Capitalized (1)
December 31, 2017	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
Total risk-based capital:
Consolidated	$	1,112.5	12.76	%	$	806.5	9.25	%	$	915.5	10.50	%	$	871.9	10.00	%
FIB	1,066.6		12.29		802.7		9.25		911.2		10.50		867.8		10.00
Tier 1 risk-based capital:
Consolidated	1,040.3		11.93		632.1		7.25		741.1		8.50		697.5		8.00
FIB	994.4		11.46		629.1		7.25		737.6		8.50		694.2		8.00
Common equity tier 1 risk-based capital:
Consolidated	962.4		11.04		501.3		5.75		610.3		7.00		566.7		6.50
FIB	994.4		11.46		499.0		5.75		607.4		7.00		564.1		6.50
Leverage capital ratio:
Consolidated	1,040.3		8.86		469.9		4.00		469.9		4.00		587.4		5.00
FIB	994.4		8.48		469.1		4.00		469.1		4.00		586.3		5.00

(1) The ratios for the requirements to be deemed “well capitalized” are only applicable to FIB and INB. However, the Company manages its capital position as if the requirements apply to the consolidated entity and has presented the ratios as if they also applied on a consolidated basis.