INCOME TAXES - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of the year	$ 25,100	$ 25,500	$ 25,900
Tax positions related to current and prior years:
Additions	0	0	1,000
Reductions	0	(100)	(100)
Expiration of statutes of limitations	(800)	(300)	(1,300)
Balance at the end of the year	$ 24,300	$ 25,100	$ 25,500