GOODWILL AND INTANGIBLE ASSETS - NET (Intangible Assets Compinents and Amortization Expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 59,573	$ 55,667
Accumulated amortization	(12,713)	(7,978)
Net carrying amount	46,860	47,689
Amortization of Intangible Assets	$ 5,416	$ 5,349	$ 2,785
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted average life at acquisition (in years)	10 years	10 years
Gross carrying amount	$ 52,974	$ 48,482
Accumulated amortization	(8,387)	(4,664)
Net carrying amount	44,587	43,818
Amortization of Intangible Assets	$ 3,961	$ 3,843	1,373
Trade name
Finite-Lived Intangible Assets [Line Items]
Weighted average life at acquisition (in years)	5 years	5 years
Gross carrying amount	$ 5,853	$ 6,372
Accumulated amortization	(3,772)	(2,894)
Net carrying amount	2,081	3,478
Amortization of Intangible Assets	$ 1,280	$ 1,319	1,222
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Weighted average life at acquisition (in years)	4 years	5 years
Gross carrying amount	$ 746	$ 813
Accumulated amortization	(554)	(420)
Net carrying amount	192	393
Amortization of Intangible Assets	$ 175	$ 187	$ 190