Stock-Based Compensation - Long-Term Performance-Based Plans - Additional (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized	$ 64,954	$ 14,262	$ 36,261
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	17,403,339
Weighted-Average Exercise Price (in dollars per share)	$ 32.59
Restricted Performance Units (in shares)	1,863,110	1,504,370	1,760,225	2,484,720
2019 LTIP
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized	$ 13,088	$ 15,300	$ 3,534
Estimated Remaining Non-Cash, Stock-Based Compensation Expense
Expense estimated to be recognized during 2021	3,566
Estimated contingent expense subsequent to 2021	6,611
Total estimated remaining expense over the term of plan	$ 10,177
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	1,996,268
Weighted-Average Exercise Price (in dollars per share)	$ 34.75
LTIP 2013
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized	$ (819)	(1,313)	(2,471)
Estimated Remaining Non-Cash, Stock-Based Compensation Expense
Estimated contingent expense subsequent to 2021	29,176
Total estimated remaining expense over the term of plan	$ 29,176
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	872,500
Weighted-Average Exercise Price (in dollars per share)	$ 40.82
LTIP 2017
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized		(13,974)	3,334
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	2,034,571
Weighted-Average Exercise Price (in dollars per share)	$ 56.89
Ergen 2020
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized	$ 5,029
Estimated Remaining Non-Cash, Stock-Based Compensation Expense
Expense estimated to be recognized during 2021	28,113
Estimated contingent expense subsequent to 2021	58,745
Total estimated remaining expense over the term of plan	$ 86,858
Class A common stock
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	27,200,000
Other Employee Performance Awards
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized	$ 29,181	(569)	17,945
Estimated Remaining Non-Cash, Stock-Based Compensation Expense
Expense estimated to be recognized during 2021	15,939
Estimated contingent expense subsequent to 2021	20,246
Total estimated remaining expense over the term of plan	$ 36,185
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	12,500,000
Weighted-Average Exercise Price (in dollars per share)	$ 27.71
Restricted Performance Units (in shares)	1,318,875
Other Employee Performance Awards | Continuing operations [Member]
Recognized non-cash stock-based compensation expense
Non-cash stock-based compensation expense recognized	$ 46,479	$ (556)	$ 22,342
Restricted Performance Units/Awards
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	1,900,000
Restricted Performance Units (in shares)	1,755,125	1,483,800	1,726,250
Restricted Performance Units/Awards | LTIP 2013
Share-based compensation additional disclosures
Restricted Performance Units (in shares)	436,250
Restricted Performance Units/Awards | Class A common stock
Share-based compensation additional disclosures
Performance Based Stock Options (in shares)	1,900,000