CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME - Schedule of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 481,406
Ending balance	355,784
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1,926	$ 9,245
Other comprehensive loss before reclassifications	(918)	(6,093)
Amounts reclassified from accumulated other comprehensive income	0	0
Net current period change in accumulated other comprehensive income	(918)	(6,093)
Ending balance	$ 1,008	$ 3,152