Regulatory Capital and Reserve Requirements (Tables)

12 Months Ended

Dec. 31, 2013

Banking and Thrift [Abstract]

Corporation's and Chemical Bank's actual capital amounts and ratios with the quantitative measures established by regulation to ensure capital adequacy

The summary below compares the Corporation's and Chemical Bank's actual capital amounts and ratios with the quantitative measures established by regulation to ensure capital adequacy:

	Actual				Minimum Required for Capital Adequacy Purposes				Required to be Well Capitalized Under Prompt Corrective Action Regulations
	Capital Amount		Ratio		Capital Amount		Ratio		Capital Amount		Ratio
	(Dollars in thousands)
December 31, 2013
Total Capital to Risk-Weighted Assets:
Corporation	$	649,836	14.0	%	$	371,465	8.0	%	N/A		N/A
Chemical Bank	579,494		12.5		370,881		8.0		$	463,601	10.0	%
Tier 1 Capital to Risk-Weighted Assets:
Corporation	591,535		12.7		185,732		4.0		N/A		N/A
Chemical Bank	521,283		11.2		185,440		4.0		278,160		6.0
Leverage Ratio:
Corporation	591,535		9.9		239,010		4.0		N/A		N/A
Chemical Bank	521,283		8.7		238,884		4.0		298,605		5.0
December 31, 2012
Total Capital to Risk-Weighted Assets:
Corporation	$	552,171	13.2	%	$	334,140	8.0	%	N/A		N/A
Chemical Bank	536,223		12.9		333,195		8.0		$	416,494	10.0	%
Tier 1 Capital to Risk-Weighted Assets:
Corporation	499,563		12.0		167,070		4.0		N/A		N/A
Chemical Bank	483,761		11.6		166,598		4.0		249,896		6.0
Leverage Ratio:
Corporation	499,563		9.2		217,145		4.0		N/A		N/A
Chemical Bank	483,761		8.9		216,784		4.0		270,980		5.0