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Goodwill and Other Intangible Assets (Details Textual) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended	1 Months Ended	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Facility management contracts	Feb. 25, 2014 Tangible and Intangible Assets of Unrelated Entity (APAC Customer Services)	Sep. 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	$ 11,300,000	$ 11,000,000
Weighted average period						2 years 1 month 24 days
Purchase price							13,000,000
Intangible Assets, Net (Excluding Goodwill)	159,113,000		159,113,000		163,400,000			7,100,000
Goodwill	494,075,000		494,075,000		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

X

- Definition

Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment

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- Definition

Weighted average period before the next renewal or extension for intangible assets with renewal or extension terms, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to intangibles acquired in connection with a business combination for which the initial accounting was incomplete.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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