Basis of Presentation and Significant Accounting Policies - Summary of Changes in Carrying Amount of Other Non-Current Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Other Noncurrent Assets [Abstract]
Balance at beginning of period	$ 14,951	$ 13,761
Debt issuance costs	45,521	4,905
Former Credit Agreement debt issuance cost write off	(11,913)
Amortization of interest expense	(4,315)	(3,715)
Balance at end of period	$ 44,244	$ 14,951