FIXED ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment
Fixed assets	$ 160,292	$ 138,422
Accumulated depreciation	(51,318)	(45,344)
Fixed assets, net	108,974	93,078
Furniture, equipment and capitalized software
Property, Plant and Equipment
Fixed assets	25,002	18,771
Leasehold improvements
Property, Plant and Equipment
Fixed assets	64,166	49,626
Corporate aircraft
Property, Plant and Equipment
Fixed assets	66,120	66,277
Other
Property, Plant and Equipment
Fixed assets	$ 5,004	$ 3,748