Restructuring and Exit costs (Schedule of Severance and Exit Costs) (Details) - Restructuring Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
Amounts reserved	$ 2,222
Costs incurred	149	$ 2,340
Amounts paid	(650)	(118)	$ (768)
Amounts released and other non-cash adjustments for the quarter ended September 30, 2015	(179)
Amounts reserved	1,542	2,222	1,542
Employee Severance Costs
Restructuring Reserve [Roll Forward]
Amounts reserved	1,014
Costs incurred	149	1,132
Amounts paid	(650)	(118)
Amounts released and other non-cash adjustments for the quarter ended September 30, 2015	(93)
Amounts reserved	420	1,014	420
Lease Obligation Costs
Restructuring Reserve [Roll Forward]
Amounts reserved	1,208
Costs incurred	0	1,208
Amounts paid	0	0
Amounts released and other non-cash adjustments for the quarter ended September 30, 2015	(86)
Amounts reserved	1,122	1,208	1,122
Other Exit Costs
Restructuring Reserve [Roll Forward]
Amounts reserved	0
Costs incurred	0	0
Amounts paid	0	0
Amounts released and other non-cash adjustments for the quarter ended September 30, 2015	0
Amounts reserved	$ 0	$ 0	$ 0