Subsequent Events - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2012
Subsequent Event [Line Items]
Expense of net debt working capital disallowed	$ 1.6
Expense disallowed under net debt working capital, net of tax	0.9
Central Merger
Subsequent Event [Line Items]
Net debt working capital		$ 296.3
Amount in excess of upper threshold		11.3
Expense of net debt working capital disallowed	1.6
Expense disallowed under net debt working capital, net of tax	$ 0.9
February 19, 2016 | Central Merger
Subsequent Event [Line Items]
Net debt working capital		291.6
Amount in excess of upper threshold		$ 6.6