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ACCUMULATED OTHER COMPREHENSIVE INCOME (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period   $ 2,346,545  
Gross amounts reclassified within AOCI $ 0 0 $ 0
Balance, end of period   2,258,382  
Total Post- Retirement Benefits Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 2,061 2,082 2,061
Gross amounts reclassified within AOCI 0 0 0
Balance, end of period 2,061 2,082 2,061
Foreign Currency Translation Adjustments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (63,448) (45,205) (79,927)
Gross amounts reclassified within AOCI 11,489 25,155 27,968
Balance, end of period (51,959) (20,050) (51,959)
Non-controlling Interest - Principal Equityholders Reclassification      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period 43,398 25,155 59,877
Gross amounts reclassified within AOCI (11,489) (25,155) (27,968)
Balance, end of period 31,909 0 31,909
Total      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Balance, beginning of period (17,989) (17,968) (17,989)
Balance, end of period $ (17,989) $ (17,968) $ (17,989)