Regulatory Restrictions (Tables)

12 Months Ended

Dec. 31, 2017

Text Block [Abstract]

Schedule of Capital Ratios

The following table summarizes capital ratios for Old National and Old National Bank as of December 31:

	Actual					Fully Phased-In Regulatory Guidelines Minimum (1)					Well Capitalized Guidelines
(dollars in thousands)	Amount		Ratio			Amount		Ratio			Amount		Ratio
2017
Total capital to risk-weighted assets
Old National Bancorp	$	1,424,123		11.40	%	$	1,311,600		10.50	%	$	N/A		N/A	%
Old National Bank		1,458,546		11.73			1,305,076		10.50			1,242,929		10.00
Common equity Tier 1 capital to risk-weighted assets
Old National Bancorp		1,298,326		10.39			874,400		7.00			N/A		N/A
Old National Bank		1,393,059		11.21			870,051		7.00			807,904		6.50
Tier 1 capital to risk-weighted assets
Old National Bancorp		1,298,326		10.39			1,061,772		8.50			N/A		N/A
Old National Bank		1,393,059		11.21			1,056,490		8.50			994,344		8.00
Tier 1 capital to average assets
Old National Bancorp		1,298,326		8.28			627,258		4.00			N/A		N/A
Old National Bank		1,393,059		8.93			623,758		4.00			779,697		5.00
2016
Total capital to risk-weighted assets
Old National Bancorp	$	1,229,878		12.18	%	$	1,060,662		10.50	%	$	N/A		N/A	%
Old National Bank		1,240,180		12.35			1,054,305		10.50			1,004,100		10.00
Common equity Tier 1 capital to risk-weighted assets
Old National Bancorp		1,162,817		11.51			707,108		7.00			N/A		N/A
Old National Bank		1,187,151		11.82			702,870		7.00			652,665		6.50
Tier 1 capital to risk-weighted assets
Old National Bancorp		1,176,849		11.65			858,631		8.50			N/A		N/A
Old National Bank		1,187,151		11.82			853,485		8.50			803,280		8.00
Tier 1 capital to average assets
Old National Bancorp		1,176,849		8.43			558,673		4.00			N/A		N/A
Old National Bank		1,187,151		8.55			555,161		4.00			693,951		5.00

N/A = not applicable

(1) When fully phased-in on January 1, 2019, Basel III Capital Rules will require banking organizations to maintain: a minimum ratio of common equity Tier 1 to risk-weighted assets of at least 4.5%, plus a 2.5% “capital conservation buffer”; a minimum ratio of Tier 1 capital to risk-weighted assets of at least 6.0%, plus the 2.5% capital conservation buffer; a minimum ratio of total capital to risk-weighted assets of at least 8.0%, plus the 2.5% capital conservation buffer; and a minimum ratio of Tier 1 capital to adjusted average consolidated assets of at least 4.0%.