CONDENSED COMBINED DEBTOR-IN-POSSESSION FINANCIAL INFORMATION - Debtors Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
ASSETS:
Accounts receivable, net of allowance for doubtful accounts	$ 226,000	$ 258,088
Prepaid expenses, deposits and other	79,483	70,537
Total current assets	411,446	401,619
Net property and equipment	279,359	284,681
Operating lease right-of-use assets	195,984	202,010
Radio broadcasting licenses	794,771	794,771
Goodwill	63,915	63,915
Assets held for sale	0	1,544
Software, net	122,918	129,128
Other assets, net of accumulated amortization	24,070	22,772
TOTAL ASSETS	1,892,463	1,900,440
LIABILITIES:
Accounts payable	6,214	21,742
Accrued expenses	69,793	73,519
Other current liabilities	46,934	131,031
Operating lease liabilities	39,206	37,631
Short-term borrowing	32,000	0
Long-term debt, current portion	0	1,924,023
Total current liabilities	194,147	2,187,946
Long-term debt	75,000	0
Operating lease liabilities, net of current portion	188,448	201,802
Deferred tax liabilities	97,452	101,937
Other long-term liabilities	21,930	23,508
Liabilities subject to compromise	1,931,787	0
SHAREHOLDERS' DEFICIT:
Equity (deficit)	(2,299,122)	(2,297,270)
Total shareholders' deficit	(616,301)	(614,753)	$ 485,662	$ 520,619
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)	1,892,463	1,900,440
Debtor-in-Possession
ASSETS:
Cash	96,546	59,989
Accounts receivable, net of allowance for doubtful accounts	13,384	13,918
Prepaid expenses, deposits and other	77,830	70,537
Due from affiliates	140	178
Total current assets	187,900	144,622
Investment in affiliates	145,252	184,868
Net property and equipment	279,359	284,681
Operating lease right-of-use assets	195,984	202,010
Radio broadcasting licenses	794,771	794,771
Goodwill	63,915	63,915
Assets held for sale	0	1,544
Software, net	122,918	129,128
Other assets, net of accumulated amortization	24,070	22,772
TOTAL ASSETS	1,814,169	1,828,311
LIABILITIES:
Accounts payable	6,214	21,742
Accrued expenses	69,237	73,040
Other current liabilities	46,934	131,031
Operating lease liabilities	39,206	37,631
Short-term borrowing	32,000
Long-term debt, current portion	0	1,849,518
Total current liabilities	193,591	2,112,962
Long-term debt	0	0
Operating lease liabilities, net of current portion	188,448	201,802
Deferred tax liabilities	97,452	101,937
Other long-term liabilities	21,930	23,508
Liabilities subject to compromise	1,931,787	0
SHAREHOLDERS' DEFICIT:
Equity (deficit)	(619,039)	(611,898)
Total shareholders' deficit	(619,039)	(611,898)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIT)	$ 1,814,169	$ 1,828,311