Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 57	$ 2,116	$ 106	$ 1,075	$ 2,279	$ 1,075	$ 435
Restructuring Reserve [Roll Forward]
Beginning Balance			341		341
Charges to operations	$ 57	$ 2,116	106	1,075	2,279	1,075	435
Non-cash charges/adjustments					122
Charges settled in cash					(2,471)	(734)	(435)
Ending Balance				341	271	341
Employee termination costs
Restructuring Cost and Reserve [Line Items]
Restructuring charge					2,279	1,075	435
Restructuring Reserve [Roll Forward]
Charges to operations					2,279	1,075	435
Workforce
Restructuring Cost and Reserve [Line Items]
Restructuring charge					1,491	1,044	435
Restructuring Reserve [Roll Forward]
Beginning Balance			310		310
Charges to operations					1,491	1,044	435
Charges settled in cash					(1,801)	(734)	$ (435)
Ending Balance				310		310
Facility
Restructuring Cost and Reserve [Line Items]
Restructuring charge					740
Restructuring Reserve [Roll Forward]
Charges to operations					740
Non-cash charges/adjustments					122
Charges settled in cash					(591)
Ending Balance					271
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charge					48	31
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 31		31
Charges to operations					48	31
Charges settled in cash					$ (79)
Ending Balance				$ 31		$ 31