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Restructuring Charges (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Restructuring Cost and Reserve
Restructuring charges	$ 1,129,000	$ 6,622,000	$ 3,335,000		$ 6,622,000
Restructuring Reserve [Roll Forward]
Restructuring charges	1,129,000	6,622,000	3,335,000		6,622,000
The 2012 Plan
Restructuring Cost and Reserve
Reversal to restructuring charges	100,000
Restructuring charges		6,600,000	2,096,000		6,600,000
Restructuring cost incurred to date			9,400,000
Restructuring Reserve [Roll Forward]
Beginning Balance			906,000
Restructuring charges		6,600,000	2,096,000		6,600,000
Payments			(2,265,000)
Non-cash settlements			(653,000)
Ending Balance	84,000		84,000
The 2012 Plan | Minimum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost			6,000,000
The 2012 Plan | Maximum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost			10,000,000
The 2012 Plan | Employee Severance and Related Benefits
Restructuring Cost and Reserve
Restructuring charges			136,000
Restructuring Reserve [Roll Forward]
Beginning Balance			906,000
Restructuring charges			136,000
Payments			(958,000)
Non-cash settlements
Ending Balance	84,000		84,000
The 2012 Plan | Facilities
Restructuring Cost and Reserve
Restructuring charges			1,960,000
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Restructuring charges			1,960,000
Payments			(1,307,000)
Non-cash settlements			(653,000)	[1]
Ending Balance	0		0
The 2012 Plan | MID Segment
Restructuring Cost and Reserve
Restructuring charges		4,000,000			4,000,000
Restructuring Reserve [Roll Forward]
Restructuring charges		4,000,000			4,000,000
The 2012 Plan | Corporate Support Functions
Restructuring Cost and Reserve
Restructuring charges		2,600,000			2,600,000
Restructuring Reserve [Roll Forward]
Restructuring charges		2,600,000			2,600,000
Q3 2013 Plan
Restructuring Cost and Reserve
Restructuring charges	1,239,000		1,239,000
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Restructuring charges	1,239,000		1,239,000
Payments			0
Non-cash settlements			0
Ending Balance	1,239,000		1,239,000
Q3 2013 Plan | Minimum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost			1,000,000
Q3 2013 Plan | Maximum
Restructuring Cost and Reserve
Company estimate of the aggregate restructuring cost			3,000,000
Q3 2013 Plan | Employee Severance and Related Benefits
Restructuring Cost and Reserve
Restructuring charges			1,239,000
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Restructuring charges			1,239,000
Payments			0
Non-cash settlements			0
Ending Balance	1,239,000		1,239,000
Q3 2013 Plan | Facilities
Restructuring Cost and Reserve
Restructuring charges			0
Restructuring Reserve [Roll Forward]
Beginning Balance			0
Restructuring charges			0
Payments			0
Non-cash settlements			0
Ending Balance	$ 0		$ 0
[1] The non-cash charge of $653 thousand is related to the termination of the Company's financing obligation associated with abandoning a construction asset at one of its facilities.

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