Regulatory Capital (Tables)

9 Months Ended

Sep. 30, 2014

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)
September 30, 2014
Total Capital to Risk-Weighted Assets:
Corporation	$	760,324	15.0	%	$	404,420	8.0	%	N/A		N/A
Chemical Bank	613,673		12.2		403,840		8.0		$	504,799	10.0	%
Tier 1 Capital to Risk-Weighted Assets:
Corporation	696,963		13.8		202,210		4.0		N/A		N/A
Chemical Bank	550,401		10.9		201,920		4.0		302,880		6.0
Leverage Ratio:
Corporation	696,963		11.1		251,133		4.0		N/A		N/A
Chemical Bank	550,401		8.8		250,986		4.0		313,732		5.0
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
September 30, 2013
Total Capital to Risk-Weighted Assets:
Corporation	$	638,786	14.2	%	$	361,199	8.0	%	N/A		N/A
Chemical Bank	568,626		12.6		360,617		8.0		$	450,771	10.0	%
Tier 1 Capital to Risk-Weighted Assets:
Corporation	582,039		12.9		180,600		4.0		N/A		N/A
Chemical Bank	511,969		11.4		180,309		4.0		270,463		6.0
Leverage Ratio:
Corporation	582,039		10.0		232,972		4.0		N/A		N/A
Chemical Bank	511,969		8.8		232,828		4.0		291,034		5.0