COMMITMENTS AND CONTINGENCIES - Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases
Rent expense from continuing operations under leases	$ 21,700	$ 19,400	$ 10,300
Future minimum payments under the leases
2016	18,944
2017	15,909
2018	12,542
2019	11,716
2020	10,648
2021 and thereafter	33,144
Total	$ 102,903
Minimum
Operating Leases
Operating leases term	1 year
Maximum
Operating Leases
Operating leases term	44 years