Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended		12 Months Ended
	Apr. 30, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011	Jun. 30, 2010
Related Party Transaction [Line Items]
Offsetting liability withholding taxes plus potential interest and penalties							$ 5.3
Prepaid expenses and other current assets representing withholding taxes							5.3
Payment of withholding taxes receivable included in prepaid and expenses and other assets	$ 5.3	$ 0	$ 0	$ 0	$ 5.3	$ 0