Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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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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- Definition

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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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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Restructuring (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended			6 Months Ended
	Dec. 31, 2011 Employees	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Restructuring Cost and Reserve [Line Items]
Workforce reduction (in employees)	70
Current portion of accrued restructuring	$ 3,430	$ 626			$ 626
Long-term portion of accrued restructuring		423			423
Restructuring Reserve [Roll Forward]
Beginning Balance		1,820	3,904		3,904
Restructuring (benefit) charge		(46)	60	0	14	0
Cash payments		(725)	(2,144)
Ending Balance	3,904	1,049	1,820		1,049
One-time Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Restructuring (benefit) charge	4,200
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Current portion of accrued restructuring		114			114
Long-term portion of accrued restructuring		423			423
Restructuring Reserve [Roll Forward]
Beginning Balance		565	593		593
Restructuring (benefit) charge	700	0	0
Cash payments		(28)	(28)
Ending Balance	593	537	565		537
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Current portion of accrued restructuring		512			512
Long-term portion of accrued restructuring		0			0
Restructuring Reserve [Roll Forward]
Beginning Balance		1,255	3,311		3,311
Restructuring (benefit) charge		(46)	60
Cash payments		(697)	(2,116)
Ending Balance		512	1,255		512
Non-Cash Stock-Based Compensation [Member]
Restructuring Reserve [Roll Forward]
Restructuring (benefit) charge	$ 400