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Restructuring - Summary of Restructuring Liability (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2013	$ 881
Accruals	7,479
Payments	(2,739)
Stock-based compensation	(1,298)
Balance at September 30, 2014	4,323
September 2014 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Stock-based compensation	(1,300)
Employee Severance Costs [Member] | September 2013 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2013	0
Accruals	1,713
Payments	(1,641)
Stock-based compensation	0
Balance at September 30, 2014	72
Facility Exit Related Costs [Member] | September 2013 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2013	881
Accruals	917
Payments	(739)
Stock-based compensation	0
Balance at September 30, 2014	1,059
Employment Contract Costs [Member] | September 2014 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2013	0
Accruals	3,551
Payments	(359)
Stock-based compensation	0
Balance at September 30, 2014	3,192
Sharebased Compensation Costs [Member] | September 2014 Restructuring Initiatives [Member]
Restructuring Cost and Reserve [Line Items]
Balance at December 31, 2013	0
Accruals	1,298
Payments	0
Stock-based compensation	(1,298)
Balance at September 30, 2014	$ 0

X

- Definition

Additions during the period to the restructuring reserve.

+ References

No definition available.

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- Definition

Restructuring Charges For Shared Based Compensation Acceleration For Termination Of Chief Executive Officer

+ References

No definition available.

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X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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X

- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747



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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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