GOODWILL AND OTHER INTANGIBLE ASSETS, Amortizable Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 198,351	$ 197,395
Accumulated amortization	(93,910)	(85,098)
Carrying amount, net	104,441	112,297
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	196,503	195,580
Accumulated amortization	(92,404)	(83,741)
Carrying amount, net	104,099	111,839
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,848	1,815
Accumulated amortization	(1,506)	(1,357)
Carrying amount, net	$ 342	$ 458

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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