Regulatory Capital (Tables)

6 Months Ended

Jun. 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)
June 30, 2014
Total Capital to Risk-Weighted Assets:
Corporation	$	748,332	15.3	%	$	391,911	8.0	%	N/A		N/A
Chemical Bank	601,561		12.3		391,305		8.0		$	489,131	10.0	%
Tier 1 Capital to Risk-Weighted Assets:
Corporation	686,892		14.0		195,955		4.0		N/A		N/A
Chemical Bank	540,214		11.0		195,653		4.0		293,479		6.0
Leverage Ratio:
Corporation	686,892		11.2		244,757		4.0		N/A		N/A
Chemical Bank	540,214		8.8		244,604		4.0		305,755		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
June 30, 2013
Total Capital to Risk-Weighted Assets:
Corporation	$	572,503	13.1	%	$	348,442	8.0	%	N/A		N/A
Chemical Bank	556,536		12.8		347,865		8.0		$	434,831	10.0	%
Tier 1 Capital to Risk-Weighted Assets:
Corporation	517,716		11.9		174,221		4.0		N/A		N/A
Chemical Bank	501,839		11.5		173,932		4.0		260,899		6.0
Leverage Ratio:
Corporation	517,716		9.1		228,436		4.0		N/A		N/A
Chemical Bank	501,839		8.8		228,126		4.0		285,157		5.0