Restructuring Charges, 2011 and 2010 Restructuring (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($)
Restructuring Charges
Balance at the beginning of the period	$ 1,254
Balance at the end of the period	637
Consolidation of leased facilities | Restructuring Plan 2011
Restructuring Charges
Balance at the beginning of the period	272
Utilized - cash	(704)
Subleased activity	474
Balance at the end of the period	42
Consolidation of leased facilities | Restructuring Plan 2010
Restructuring Charges
Balance at the beginning of the period	982
Utilized - cash	(346)
Adjustment to reserve	(215)
Balance at the end of the period	$ 421