Deferred Compensation Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred compensation plan liability	$ 11.6	$ 12.7
Cash surrender value of the policies	15.4	14.5
Benefits paid	$ 1.7	$ 1.9	$ 1.3
Employee
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of receipt of base compensation (up to)	75.00%
Percentage of receipt of incentive pay compensation (up to)	100.00%
Non Employee Director
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of receipt of base compensation (up to)	100.00%