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Schedule of Rollforward of Non-controlling Interest Balance (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Noncontrolling Interest [Line Items]        
Noncontrolling interest beginning balance     $ 246,411  
Net income attributable to non-controlling interest $ 17,419 $ 16,676 42,859 $ 43,746
Distributions to non-controlling interest     (26,027)  
Foreign currency translation adjustment     4,469  
Noncontrolling interest ending balance $ 267,315   267,315  
Non-controlling Interest        
Noncontrolling Interest [Line Items]        
Loss recorded in accumulated other comprehensive loss     (594)  
Gain reclassified from accumulated other comprehensive loss into earnings     $ 197