Goodwill and Other Intangible Assets (Details Textual) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended	1 Months Ended	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 Facility management contracts	Feb. 25, 2014 Tangible and Intangible Assets of Unrelated Entity (APAC Customer Services)	Jun. 30, 2014 Tangible and Intangible Assets of Unrelated Entity (APAC Customer Services)
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 3,900,000	$ 3,600,000	$ 7,500,000	$ 7,300,000
Weighted average period						1 year 4 months 24 days
Purchase price							13,000,000
Intangible Assets, Net (Excluding Goodwill)	162,991,000		162,991,000		163,400,000			7,100,000
Goodwill	494,095,000		494,095,000		490,196,000			3,900,000
Aggregate retrospective adjustments to provisional amounts								100,000
Reduction of intangible assets								300,000
Increase in goodwill								$ 200,000