Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Liabilities:
Derivative financial instruments	$ 42,267	$ 19,600
Long-term obligations	1,573,650	1,601,287
Significant Other Observable Inputs (Level 2) [Member]
Liabilities:
Derivative financial instruments	42,267	19,600
Long-term obligations	$ 1,573,650	$ 1,601,287

Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant