GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	$ 126,736	$ 132,004
Accumulated amortization	(99,280)	(90,858)
Net carrying value	27,456	41,146
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	5,110	9,332
Accumulated amortization	(4,444)	(7,104)
Net carrying value	666	2,228
Patents, trademarks and tradename
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	12,612	14,039
Accumulated amortization	(5,598)	(223)
Net carrying value	7,014	13,816
Customer relationships and contracts
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	99,750	100,271
Accumulated amortization	(84,422)	(78,926)
Net carrying value	15,328	21,345
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	8,485	7,583
Accumulated amortization	(4,037)	(3,826)
Net carrying value	4,448	3,757
Customer Backlog
Finite-Lived Intangible Assets [Line Items]
Gross carrying value	779	779
Accumulated amortization	(779)	(779)
Net carrying value	$ 0	$ 0