CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 529,134	$ 720,662
Accounts receivable, net of allowance of $33,228 in 2021 and $38,777 in 2020	704,096	801,380
Prepaid expenses	99,074	79,508
Other current assets	33,777	17,426
Total Current Assets	1,366,081	1,618,976
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment, net	825,208	811,702
INTANGIBLE ASSETS AND GOODWILL
Indefinite-lived intangibles - licenses	1,771,882	1,770,345
Other intangibles, net	1,881,023	1,924,492
Goodwill	2,313,223	2,145,935
OTHER ASSETS
Operating lease right-of-use assets	781,459	825,887
Other assets	112,122	105,624
Total Assets	9,050,998	9,202,961
CURRENT LIABILITIES
Accounts payable	157,032	149,333
Current operating lease liabilities	85,242	76,503
Accrued expenses	249,224	265,651
Accrued interest	69,843	68,054
Deferred revenue	143,491	123,488
Current portion of long-term debt	28,628	34,775
Total Current Liabilities	733,460	717,804
Long-term debt	5,976,358	5,982,155
Series A Mandatorily Redeemable Preferred Stock, par value $0.001, authorized 60,000 shares, 60,000 shares issued in 2021 and 2020	60,000	60,000
Noncurrent operating lease liabilities	748,842	764,491
Deferred income taxes	647,097	556,477
Other long-term liabilities	71,290	71,217
Commitments and contingent liabilities (Note 6)
STOCKHOLDERS’ EQUITY
Noncontrolling interest	7,830	8,350
Preferred stock	0	0
Additional paid-in capital	2,854,647	2,849,020
Accumulated deficit	(2,045,343)	(1,803,620)
Accumulated other comprehensive income (loss)	(22)	194
Cost of shares (261,181 in 2021 and 254,066 in 2020) held in treasury	(3,302)	(3,199)
Total Stockholders' Equity	813,951	1,050,817
Total Liabilities and Stockholders' Equity	9,050,998	9,202,961
Class A Common Stock
STOCKHOLDERS’ EQUITY
Common stock	112	65
Class B Common Stock
STOCKHOLDERS’ EQUITY
Common stock	29	7
Special Warrants
STOCKHOLDERS’ EQUITY
Common stock	$ 0	$ 0

Contract With Customer, Including Other Liabilities, Current

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- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).