Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Receivables [Abstract]
Total trade accounts receivable	$ 172,809		$ 172,809		$ 167,149
Contract assets	57,172		57,172		34,615
Allowance for doubtful accounts	(12,457)		(12,457)		(12,027)
Total trade accounts receivable and contract assets, net	217,524		217,524		189,737	$ 196,840
Trade accounts receivable - DISH Network	11,065		11,065		43,295	43,295
Allowance for Loan and Lease Loss, Recovery of Bad Debts	8,000	$ 2,700	14,800	$ 8,400
Contract with Customer, Asset and Liability [Abstract]
Contract liabilities	74,135		74,135		64,417	$ 65,959
Contract with Customer, Liability, Noncurrent	11,903		11,903		13,036
Contract with Customer, Liability	86,038		86,038		77,453
Change in Contract with Customer, Asset and Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized			54,200
Revenue, Performance Obligation [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 1,000,000		$ 1,000,000
Revenue, Remaining Performance Obligation, Recognition In Next Rolling Twelve Months, Percentage	38.00%		38.00%
Trade accounts receivable
Receivables [Abstract]
Total trade accounts receivable	$ 163,707		$ 163,707		156,794
Trade accounts receivable - DISH Network	9,372		9,372		16,118
Lease Receivable
Receivables [Abstract]
Total trade accounts receivable	9,102		9,102		10,355
Trade accounts receivable - DISH Network	$ 1,693		$ 1,693		$ 27,177