Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
	Dec. 22, 2010 Onex Corporation	Dec. 22, 2010 Onex Corporation Amended and Restated management services agreement	Dec. 22, 2010 Onex Corporation Amended and Restated management services agreement	Apr. 05, 2012 U.S. Bank National Association Senior secured credit facility
Related Party Transactions
Annual advisory fee prior to amended agreement	$ 0.4
Annual advisory fee			$ 0.7
Initial term of agreement		10 years
Percentage of outstanding indebtedness held by related party				9.30%