CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES:
Net income (loss)	$ (242,224,000)	$ (420,212,000)	$ (361,435,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	50,231,000	45,331,000	44,288,000
Net amortization of deferred financing costs (net of original issue discount and debt premium)	586,000	157,000	327,000
Net deferred taxes (benefit) and other	(76,260,000)	5,407,000	(61,798,000)
Provision for bad debts	16,349,000	4,549,000	8,909,000
Net (gain) loss on sale or disposal of assets	(139,000)	(7,640,000)	(12,158,000)
Non-cash stock-based compensation expense	11,134,000	15,882,000	15,149,000
Net loss on extinguishment of debt	0	2,046,000	0
Deferred compensation	3,578,000	6,118,000	(1,357,000)
Impairment loss	264,432,000	545,457,000	493,988,000
Accretion expense (income), net of asset retirement obligation adjustments	0	65,000	60,000
Changes in assets and liabilities (net of effects of acquisitions, dispositions, consolidation, and deconsolidation of Variable Interest Entities (VIEs)):
Accounts receivable	86,662,000	(30,856,000)	1,777,000
Prepaid expenses, deposits and other	(22,041,000)	(283,000)	1,431,000
Accounts payable, accrued expenses and other current liabilities	(8,800,000)	(27,777,000)	1,217,000
Accrued interest expense	(77,000)	3,875,000	(6,278,000)
Accrued liabilities - long-term	822,000	(9,931,000)	(21,871,000)
Prepaid expenses - long-term	973,000	0	0
Net cash provided by (used in) operating activities	85,226,000	132,188,000	102,249,000
INVESTING ACTIVITIES:
Additions to property and equipment	(29,630,000)	(70,476,000)	(29,837,000)
Proceeds from sale of property, equipment, intangibles and other assets	10,817,000	29,321,000	185,761,000
Purchases of businesses and audio assets	(31,639,000)	(40,136,000)	(71,434,000)
Additions to amortizable intangible assets	(1,207,000)	(7,425,000)	(11,949,000)
Purchases of investments	0	(1,800,000)	(1,250,000)
Proceeds from sale of property reflected as restricted cash	0	0	70,187,000
Net cash provided by (used in) investing activities	(51,659,000)	(90,516,000)	141,478,000
FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	0	430,000,000	0
Borrowing under the revolving senior debt	231,121,000	194,000,000	80,000,000
Payments of long-term debt	(15,994,000)	(521,700,000)	(81,348,000)
Payments of revolving senior debt	(233,394,000)	(257,000,000)	0
Payment for debt issuance costs	0	(7,691,000)	0
Proceeds from issuance of employee stock plan	240,000	1,329,000	1,428,000
Proceeds from the exercise of stock options	0	244,000	153,000
Purchase of vested employee restricted stock units	(1,527,000)	(2,905,000)	(5,186,000)
Payment of dividends on common stock	(2,692,000)	(30,273,000)	(49,770,000)
Payment of dividend equivalents on vested restricted stock units	(750,000)	(1,201,000)	(873,000)
Repurchase of common stock	0	(18,340,000)	(30,040,000)
Net cash provided by (used in) financing activities	(22,996,000)	(213,537,000)	(85,636,000)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	10,571,000	(171,865,000)	158,091,000
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	20,393,000	192,258,000	34,167,000
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF YEAR	30,964,000	20,393,000	192,258,000
Cash paid during the period for:
Interest	86,263,000	101,155,000	96,843,000
Income taxes	$ 2,724,000	$ 39,100,000	$ 54,217,000