Restructuring Charges Restructuring Charges (Details) - Employee Separation Costs - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]
Costs incurred and charged to expense	$ 2,449	$ 1,757
Restructuring Reserve [Roll Forward]
Accrued liability beginning balance	449
Costs incurred and charged to expense	2,449
Cash payments	(1,201)
Accrued liability ending balance	$ 1,697