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Related Party Transactions - Additional Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Majority shareholder
Related Party Transaction [Line Items]
Advisory fees	$ 0.5	$ 0.5
Due to related parties	1.5		1.0
Class L shareholders
Related Party Transaction [Line Items]
Line of credit facility, amount outstanding	50.0		50.0
Accrued interest	$ 2.0		$ 0.7

Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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