Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2013

Restructuring and Related Activities [Abstract]

Schedule of Restructuring Charges by Type of Cost

	By Type of Cost
	Employee Separation Costs		Contract Assignment Costs		Asset Related and Other Costs		Total
Costs incurred and charged to expense for the year ended December 31, 2013	$	3,961	$	—	$	1,804	$	5,765
Costs incurred and charged to expense for the year ended December 31, 2012	$	9,052	$	3,629	$	2,544	$	15,225
Costs incurred and charged to expense for the year ended December 31, 2011	$	7,739	$	—	$	911	$	8,650

Changes to the accrued restructuring liability for 2013 (in thousands):

	By Type of Cost
	Employee Separation Costs			Contract Assignment Costs			Total
Accrued liability as of December 31, 2012	$	731		$	1,700		$	2,431
Costs incurred and charged to expense for the year ended December 31, 2013	3,961			—			3,961
Cash payments	(3,936		)	(1,700		)	(5,636		)
Accrued liability as of December 31, 2013	$	756		$	—		$	756