ACQUISITION (Details) In Millions, unless otherwise specified						0 Months Ended		12 Months Ended			12 Months Ended	0 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2014 Client Lists [Member] USD ($)	Dec. 31, 2013 Client Lists [Member] USD ($)	Jun. 12, 2014 Misco Solutions B.V. [Member] USD ($)	Jun. 12, 2014 Misco Solutions B.V. [Member] EUR (€)	Dec. 31, 2014 Misco Solutions B.V. [Member] USD ($)	Jun. 12, 2014 Misco Solutions B.V. [Member] USD ($)	Jun. 12, 2014 Misco Solutions B.V. [Member] EUR (€)	Dec. 31, 2014 Misco Solutions B.V. [Member] Client Lists [Member] USD ($)	Jun. 12, 2014 Misco Solutions B.V. [Member] Client Lists [Member] Amortizable Intangible Assets One [Member]	Jun. 12, 2014 Misco Solutions B.V. [Member] Client Lists [Member] Amortizable Intangible Assets Two [Member]	Jun. 12, 2014 Misco Solutions B.V. [Member] Trademarks [Member] USD ($)
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross						$ 7.3	€ 5.4
Escrow deposit to secure sellers' indemnification obligations									0.6	0.4
Duration period of escrow deposit						1 year	1 year
Goodwill	3.9	2.4	2.4						1.5
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount								1.0			1.0			0.2
Accumulated Amortization	$ 7.0	$ 5.6		$ 2.6	$ 2.2			$ 0.1			$ 0.1
Percentage of Expected Amortization of Finite Intangible Assets												62.00%	38.00%
Useful life of intangible assets												10 years	4 years