GOODWILL AND OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$ 253,312
Acquired during the period	2,901
Translation adjustment	0
Amortization	0
Ending balance	256,213
Other Intangibles Assets [Roll Forward]
Balance at beginning of period	130,333
Acquired during the year	2,027
Translation adjustment	(1,392)
Amortization	(10,667)	$ (11,237)
Balance at end of period	120,301
Total Goodwill and Intangible Assets [Roll Forward]
Beginning Balance	383,645
Acquired during the year	4,928
Translation adjustment	(1,392)
Amortization	(10,667)	$ (11,237)
Ending Balance	376,514
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	196,933		$ 196,745
Accumulated amortization	(76,632)		(66,412)
Carrying amount, net	120,301		130,333
Vendor Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2,496		2,496
Accumulated amortization	(1,393)		(1,330)
Carrying amount, net	1,103		1,166
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	192,707		192,512
Accumulated amortization	(74,003)		(63,957)
Carrying amount, net	118,704		128,555
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,730		1,737
Accumulated amortization	(1,236)		(1,125)
Carrying amount, net	$ 494		$ 612