Quarterly Financial Information - Cost of Sales Reclassification (Details) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cost of Sales from products											$ 155,516	$ 113,399	$ 66,154
Cost of Sales from services											$ 73,111	57,233	$ 63,054
Adjustment for Immaterial Error in Classification of Cost of Sales Between Services And Products [Member]
Cost of Sales from products	$ 4,349	$ (1,146)	$ (508)	$ 1,124	$ (806)	$ (1,400)	$ (1,654)	$ (2,206)	$ 2,695	$ (1,082)		7,819
Cost of Sales from services	$ (4,349)	$ 1,146	$ 508	$ (1,124)	$ 806	$ 1,400	$ 1,654	$ 2,206	$ (2,695)	$ 1,082		$ (7,819)