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GOODWILL AND OTHER INTANGIBLE ASSETS Balances and Changes in Carrying Amounts of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 582,336	$ 506,905
Acquisitions		114,903
Acquisitions and Purchase Price Adjustments	8,362
Impairment	(47,244)
Translation	(16,304)	(39,472)
Goodwill, ending balance	527,150	582,336
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, January 1, 2016	72,358
Cumulative goodwill impairment charges, December 31, 2016	119,602	72,358
United States [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	202,020	202,020
Acquisitions		0
Acquisitions and Purchase Price Adjustments	0
Impairment	0
Translation	0	0
Goodwill, ending balance	202,020	202,020
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, January 1, 2016	17,038
Cumulative goodwill impairment charges, December 31, 2016	17,038	17,038
Canada [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	118,529	141,189
Acquisitions		0
Acquisitions and Purchase Price Adjustments	0
Impairment	0
Translation	3,611	(22,660)
Goodwill, ending balance	122,140	118,529
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, January 1, 2016	32,265
Cumulative goodwill impairment charges, December 31, 2016	32,265	32,265
Other Businesses [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	261,787	163,696
Acquisitions		114,903
Acquisitions and Purchase Price Adjustments	8,362
Impairment	(47,244)
Translation	(19,915)	(16,812)
Goodwill, ending balance	202,990	261,787
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Cumulative goodwill impairment charges, January 1, 2016	23,055
Cumulative goodwill impairment charges, December 31, 2016	$ 70,299	$ 23,055

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
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