Property and Equipment and Intangible Assets - Estimated Future Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets
Intangible Assets	$ 43,822	$ 42,317
Accumulated Amortization	(18,815)	(20,359)
Amortization expense	6,000	9,000	$ 6,000
Goodwill	120,000	120,000
Estimated future amortization of identifiable intangible assets
2017	5,082
2018	5,082
2019	4,950
2020	3,742
2021	1,214
Thereafter	4,937
Total	25,007
Wireless
Intangible Assets
Goodwill	$ 120,000
Minimum
Intangible Assets
Useful life	5 years
Maximum
Intangible Assets
Useful life	20 years
Technology-based
Intangible Assets
Intangible Assets	$ 9,773	14,510
Accumulated Amortization	(994)	(6,297)
Trademarks
Intangible Assets
Intangible Assets	22,499	16,257
Accumulated Amortization	(6,271)	(2,512)
Contract-based
Intangible Assets
Intangible Assets	8,650	8,650
Accumulated Amortization	(8,650)	(8,650)
Customer relationships
Intangible Assets
Intangible Assets	2,900	2,900
Accumulated Amortization	$ (2,900)	$ (2,900)