CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Class A and B Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Earnings (Losses)	Treasury Stock, at cost	Non-controlling Interests
Beginning balance at Dec. 31, 2018	$ 4,155,474	$ 102	$ 3,702,522	$ (125,100)	$ 694,129	$ (131,454)	$ 15,275
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	2,046		2,046
Employee benefits	6,654		6,654
Employee Stock Purchase Plan	2,749		2,749
Stock-based compensation	2,628		2,628
Purchase of non-controlling interest	(7,313)		(2,666)				(4,647)
Other comprehensive income (loss)	849			849			0
Net income (loss)	15,008				14,202		806
Other, net	1,441		(156)		1,597
Ending balance at Mar. 31, 2019	4,179,536	102	3,713,777	(124,251)	709,928	(131,454)	11,434
Beginning balance at Dec. 31, 2019	3,745,553	105	3,290,483	(122,138)	632,809	(131,454)	75,748
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options	178		178
Employee benefits	6,920		6,920
Employee Stock Purchase Plan	2,924		2,924
Stock-based compensation	2,384		2,384
Issuance of equity and contribution of assets pursuant to the Yahsat JV formation	2,824		4,338				(1,514)
Contribution by non-controlling interest holder	4,000						4,000
Other comprehensive income (loss)	(86,403)			(70,080)			(16,323)
Net income (loss)	(57,737)				(54,295)		(3,442)
Treasury share repurchase	(5,893)					(5,893)
Other, net	133		133		0		0
Ending balance at Mar. 31, 2020	$ 3,605,575	$ 105	$ 3,307,360	$ (192,218)	$ 569,446	$ (137,347)	$ 58,229