Supplemental Financial Information - Other Current and Non-Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Other current assets, net:
Inventory	$ 93,751	$ 79,621
Prepaids and deposits	51,945	50,145
Contract acquisition costs, net	12,578	16,869
Other, net	27,371	22,213
Other Assets, Current	192,724	179,531
Other non-current assets, net:
Restricted marketable investment securities	845	8,093
Restricted cash	8,695	2,458
Deferred tax assets, net	9,404	7,251
Capitalized software, net	111,911	101,786
Capitalized costs, net	103,768	113,592	$ 112,533	$ 114,306
Other, net	25,783	22,628
Total other non-current assets, net	344,569	334,841
DISH Network
Other current assets, net:
Trade accounts receivable - DISH Network	7,079	10,683
Other non-current assets, net:
Other receivables - DISH Network	94,116	92,892
Contract Acquisition Costs
Other non-current assets, net:
Capitalized costs, net	91,190	96,723
Contract Fulfillment Costs
Other non-current assets, net:
Capitalized costs, net	$ 2,625	$ 3,010