Property and Equipment Property and Equipment (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 47,959	$ 20,963	$ 15,457
Depreciation expense, cost of goods sold	9,500	5,300	4,000
Impairment of assets	11,928	$ 0	$ 134
Technology Equipment, Enterprise Resource Planning System [Member]
Property, Plant and Equipment [Line Items]
Impairment of assets	11,900
Unamortized prepaid expenses	1,600
Future obligated payments	$ 2,000