ACCUMULATED OTHER COMPREHENSIVE INCOME (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning of period			$ 2,160,202
Other comprehensive income before reclassifications				$ (447)
Other comprehensive loss, net of tax	$ 0	$ 0	0	(447)
Gross amounts reclassified within accumulated other comprehensive income			0	329
Balance, end of period	2,314,650		2,314,650
Total Post- Retirement Benefits Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning of period			2,061	2,305
Other comprehensive income before reclassifications				(447)
Other comprehensive loss, net of tax				(447)
Gross amounts reclassified within accumulated other comprehensive income			0	0
Balance, end of period	2,061	1,858	2,061	1,858
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning of period			(79,927)	(79,927)
Other comprehensive income before reclassifications				0
Other comprehensive loss, net of tax				0
Gross amounts reclassified within accumulated other comprehensive income			27,968	0
Balance, end of period	(51,959)	(79,927)	(51,959)	(79,927)
Non-controlling Interest - Principal Equityholders Reclassification
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning of period			59,877	59,625
Other comprehensive income before reclassifications				0
Other comprehensive loss, net of tax				0
Gross amounts reclassified within accumulated other comprehensive income			(27,968)	329
Balance, end of period	31,909	59,954	31,909	59,954
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance, beginning of period			(17,989)	(17,997)
Balance, end of period	$ (17,989)	$ (18,115)	$ (17,989)	$ (18,115)