CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows From Operating Activities:
Net income (loss)	$ 448,846	$ 641,563
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation and amortization	176,341	190,385
Realized and unrealized losses (gains) on investments and derivatives and other	(42,546)	6,283
Non-cash, stock-based compensation	15,285	19,375
Deferred tax expense (benefit)	122,386	147,285
Changes in allowance for credit losses	(4,599)	(15,653)
Change in long-term deferred revenue and other long-term liabilities	4,017	(5,117)
Other, net	58,885	9,138
Changes in current assets and current liabilities, net	(73,271)	132,239
Net cash flows from operating activities	705,344	1,125,498
Cash Flows From Investing Activities:
Purchases of marketable investment securities	(55,200)	(139,692)
Sales and maturities of marketable investment securities	2,512,274	381,595
Purchases of property and equipment	(629,374)	(115,096)
Capitalized interest related to FCC authorizations (Note 2)	(266,917)	(281,721)
Refund of FCC authorization deposit		337,490
Purchases of FCC authorizations, including deposits (Note 10)	(7,206,757)
Other, net	3,348	2,006
Net cash flows from investing activities	(5,642,626)	184,582
Cash Flows From Financing Activities:
Repayment of long-term debt and finance lease obligations	(5,818)	(19,149)
Redemption and repurchases of senior notes	(1,175)	(205,354)
Net proceeds from Class A common stock options exercised and stock issued under the Employee Stock Purchase Plan	4,616	6,389
Other, net	4,428	(11,341)
Net cash flows from financing activities	2,051	(229,455)
Net increase (decrease) in cash, cash equivalents, restricted cash and cash equivalents	(4,935,231)	1,080,625
Cash, cash equivalents, restricted cash and cash equivalents, beginning of period (Note 5)	7,734,260	3,453,994
Cash, cash equivalents, restricted cash and cash equivalents, end of period (Note 5)	$ 2,799,029	$ 4,534,619