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Restructuring - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended		3 Months Ended		9 Months Ended	12 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Mar. 31, 2014 September 2013 Restructuring Initiatives [Member] Employees	Feb. 28, 2014 September 2013 Restructuring Initiatives [Member] Employees	Sep. 30, 2014 September 2013 Restructuring Initiatives [Member]	Jun. 30, 2014 September 2013 Restructuring Initiatives [Member] Employees	Sep. 30, 2014 September 2013 Restructuring Initiatives [Member]	Sep. 30, 2014 September 2013 Restructuring Initiatives [Member]	Dec. 31, 2013 September 2013 Restructuring Initiatives [Member]	Sep. 30, 2014 September 2013 Restructuring Initiatives [Member] Employee Severance Costs [Member]	Sep. 30, 2014 September 2013 Restructuring Initiatives [Member] Facility Exit Related Costs [Member]	Sep. 30, 2014 September 2014 Restructuring Initiatives [Member]	Sep. 30, 2014 September 2014 Restructuring Initiatives [Member] Chief Executive Officer [Member]	Sep. 30, 2014 September 2014 Restructuring Initiatives [Member] Chief Executive Officer [Member]
Restructuring Cost and Reserve [Line Items]
Reduction in number of employees after restructuring						21	41		5
Restructuring charges	$ 1,064,000	$ 2,411,000	$ 7,480,000	$ 2,411,000				$ 87,000		$ 2,600,000	$ 5,900,000	$ 3,300,000	$ 1,700,000	$ 917,000		$ 1,100,000	$ 4,800,000
Expense related to accelerated vesting of restricted stock			1,298,000										0		1,300,000
Restructuring liability current	3,909,000		3,909,000		610,000
Restructuring liability non-current	$ 414,000		$ 414,000

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- Definition

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

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- Definition

The number of positions eliminated during the period as a result of restructuring activities.

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to 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

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-Number Topic 5

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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.

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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next 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, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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