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Restructuring and Related Charges (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2013 Campus	Sep. 30, 2014	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring liabilities	$ 10.4	$ 6.6	$ 10.4
Lease term expire	2022
Campus location closed	20
Severance and other employee separation costs			6.9
Non cash adjustments of accretion of interest on lease costs		1.0
Non-cash adjustments for lease and related costs primarily		3.9
Non-cash adjustments of share-based compensation			1.4
Severance and other employee separation costs paid			6.1
Lease marginal discount rate		4.50%
Lease and Related Costs, Net [Member]
Restructuring Cost and Reserve [Line Items]
Contractual obligation	$ 36.0		$ 36.0

X

- Definition

Campus location closed.

+ References

No definition available.

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X

- Definition

The last year for which all current leases will expire.

+ References

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X

- Definition

Marginal discount rate of lease.

+ References

No definition available.

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X

- Definition

Non cash adjustments of share-based compensation.

+ References

No definition available.

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X

- Definition

Restructuring and related cost non cash adjustment for lease and related cost.

+ References

No definition available.

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X

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

No definition available.

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- Definition

Severance and other employee separation costs paid.

+ References

No definition available.

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- Definition

Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present values. Excludes accretion associated with asset retirement obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 410

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6392676&loc=d3e7480-110848



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 35

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6394232&loc=d3e17558-110866

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- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

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- Definition

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 4



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

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