Restructuring Charges, 2011 and 2010 Restructuring (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($)
Restructuring Charges
Balance at the beginning of the period	$ 1,254
Balance at the end of the period	2,594
Restructuring Plan 2011 | Consolidation of leased facilities
Restructuring Charges
Balance at the beginning of the period	272
Utilized - cash	(496)
Subleased activity	323
Balance at the end of the period	99
Restructuring Plan 2010 | Consolidation of leased facilities
Restructuring Charges
Balance at the beginning of the period	982
Utilized - cash	(247)
Adjustment to reserve	(72)
Balance at the end of the period	$ 663