CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
OPERATING ACTIVITIES:
Net income (loss)	$ (3,572,000)	$ (242,224,000)	$ (420,212,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	52,238,000	50,231,000	45,331,000
Net amortization of deferred financing costs (net of original issue discount and debt premium)	4,030,000	586,000	157,000
Net deferred taxes (benefit) and other	13,721,000	(76,260,000)	5,407,000
Provision for bad debts	3,173,000	16,349,000	4,549,000
Net (gain) loss on sale or disposal of assets and businesses	(8,363,000)	(139,000)	(7,640,000)
Non-cash stock-based compensation expense	11,185,000	11,134,000	15,882,000
Net loss on extinguishment of debt	8,168,000	0	2,046,000
Deferred compensation	4,369,000	3,578,000	6,118,000
Impairment loss	2,214,000	264,432,000	545,457,000
Change in fair value of contingent consideration	1,117,000	0	0
Accretion expense	0	0	65,000
Changes in assets and liabilities (net of effects of acquisitions and dispositions):
Accounts receivable	(3,604,000)	86,662,000	(30,856,000)
Prepaid expenses and deposits	(20,623,000)	(22,041,000)	(283,000)
Accounts payable and accrued liabilities	14,344,000	(8,800,000)	(27,777,000)
Accrued interest expense	4,858,000	(77,000)	3,875,000
Accrued liabilities - long-term	(23,957,000)	822,000	(9,931,000)
Prepaid expenses - long-term	0	973,000	0
Net cash provided by (used in) operating activities	59,298,000	85,226,000	132,188,000
INVESTING ACTIVITIES:
Additions to property, equipment and software	(76,607,000)	(30,837,000)	(77,901,000)
Proceeds from sale of property, equipment, intangibles and other assets	6,321,000	10,817,000	29,321,000
Purchases of businesses and audio assets	(54,798,000)	(31,639,000)	(40,136,000)
Purchases of investments	0	0	(1,800,000)
Net cash provided by (used in) investing activities	(125,084,000)	(51,659,000)	(90,516,000)
FINANCING ACTIVITIES:
Proceeds from issuance of long-term debt	585,000,000	0	430,000,000
Borrowing under the accounts receivable facility	75,000,000	0	0
Borrowing under the revolving senior debt	107,000,000	231,121,000	194,000,000
Payments of long-term debt	(121,635,000)	(15,994,000)	(521,700,000)
Payments of revolving senior debt	(124,000,000)	(233,394,000)	(257,000,000)
Retirement of notes	(400,000,000)	0	0
Payment of call premium and other fees	(14,500,000)	0	0
Payment for debt issuance costs	(10,491,000)	0	(7,691,000)
Proceeds from issuance of employee stock plan	316,000	240,000	1,329,000
Proceeds from the exercise of stock options	86,000	0	244,000
Purchase of vested employee restricted stock units	(2,066,000)	(1,527,000)	(2,905,000)
Payment of dividends on common stock	0	(2,692,000)	(30,273,000)
Payment of dividend equivalents on vested restricted stock units	(449,000)	(750,000)	(1,201,000)
Repurchase of common stock	0	0	(18,340,000)
Net cash provided by (used in) financing activities	94,261,000	(22,996,000)	(213,537,000)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	28,475,000	10,571,000	(171,865,000)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, BEGINNING OF YEAR	30,964,000	20,393,000	192,258,000
CASH AND CASH EQUIVALENTS, END OF YEAR	59,439,000	30,964,000	20,393,000
Cash paid (received) during the period for:
Interest	82,476,000	86,263,000	101,155,000
Income taxes	$ (300,000)	$ 2,724,000	$ 39,100,000