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Schedule of Rollforward of Non-controlling Interest Balance (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Noncontrolling Interest [Line Items]        
Noncontrolling interest beginning balance     $ 246,411  
Net income attributable to non-controlling interest $ 16,803 $ 18,818 25,440 $ 27,070
Distributions to non-controlling interest     (7,114)  
Foreign currency translation adjustment     5,791  
Noncontrolling interest ending balance $ 269,937   269,937  
Non-controlling Interest        
Noncontrolling Interest [Line Items]        
Loss recorded in accumulated other comprehensive loss     (750)  
Loss reclassified from accumulated other comprehensive loss into earnings     $ 159