Nature of Business, Basis of Presentation and Summary of Significant Accounting Policies (Supplemental Cash Flow Information) (Detail) - USD ($) $ in Thousands		5 Months Ended	7 Months Ended	12 Months Ended
	Jun. 04, 2018	Jun. 03, 2018	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2017
Supplemental disclosures of cash flow information:
Interest paid			$ 49,785	$ 76,846
Adequate protection payments on the Predecessor Term Loan		$ 37,802	0	0
Income taxes paid		1,992	7,266	18,590
Supplemental disclosures of non-cash flow information:
Trade revenue		18,973	26,516	45,308
Trade expense		17,964	27,098	44,378
Transfer of deposit from escrow - WKQX acquisition		0	4,750
Supplemental disclosures of non-cash reorganization items impact on changes in assets and liabilities:
Accounts receivable		(11)
Prepaid expenses and other current assets		21,077
Property and equipment		(121,732)
Other intangible assets, goodwill and other assets		283,217
Accounts payable, accrued expenses and other liabilities		(36,415)
Issuance of Successor Company Term Loan		1,300,000
Cancellation of Predecessor Company stockholders' equity	$ (1,397,917)	649,620
Issuance of Successor Company stockholders' equity		(325,000)
Reconciliation of cash and cash equivalents and restricted cash to the Consolidated Balance Sheet:
Cash and cash equivalents		50,046	27,584	15,142
Restricted cash		38,305	2,454	1,865
Total cash and cash equivalents and restricted cash		88,351	$ 30,038	$ 17,007	$ 111,890
7.78% Senior Notes
Supplemental disclosures of non-cash reorganization items impact on changes in assets and liabilities:
Cancellation of debt		(610,000)
Term Loan
Supplemental disclosures of non-cash reorganization items impact on changes in assets and liabilities:
Cancellation of debt		$ (1,684,407)