GUARANTOR SUBSIDIARIES - Schedule Of Guarantor Subsidiaries, Balance Sheet (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	$ 286,370	$ 845,030	$ 542,910	$ 772,678
Accounts receivable, net of allowance	1,433,019	1,364,404
Intercompany receivables	0	0
Prepaid expenses	230,209	184,586
Assets held for sale	0	55,602
Other current assets	77,876	55,065
Total Current Assets	2,027,474	2,504,687
Structures, net	1,152,066	1,196,676
Other property, plant and equipment, net	735,997	751,486
Indefinite-lived intangibles - licenses	2,408,184	2,413,899
Indefinite-lived intangibles - permits	977,152	960,966
Other intangibles, net	596,287	740,508
Goodwill	4,083,589	4,066,575		4,128,887
Intercompany notes receivable	0	0
Due from iHeartCommunications	0	0
Investment in subsidiaries	0	0
Other assets	276,511	227,450
Total Assets	12,257,260	12,862,247
Accounts payable	157,217	142,600
Accrued expenses	718,458	724,793
Intercompany payable	0	0
Accrued interest	149,533	264,170
Deferred income	215,410	200,103
Current portion of long-term debt	619,003	342,908
Total Current Liabilities	1,859,621	1,674,574
Long-term debt	19,995,897	20,022,080
Due to Clear Channel Outdoor	0	0
Intercompany long-term debt	0	0
Deferred income taxes	1,460,882	1,457,095
Other long-term liabilities	618,575	593,973
Total member's equity (deficit)	(11,677,715)	(10,885,475)	(10,962,780)	(10,606,681)
Total Liabilities and Member's Deficit	12,257,260	12,862,247
Guarantor subsidiary borrowings under the senior secured credit facilities	5,800,000	5,800,000
Eliminations
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Accounts receivable, net of allowance	0	0
Intercompany receivables	(916,769)	(169,721)
Prepaid expenses	0	0
Assets held for sale		0
Other current assets	(329,661)	(45,360)
Total Current Assets	(1,246,430)	(215,081)
Structures, net	0	0
Other property, plant and equipment, net	0	0
Indefinite-lived intangibles - licenses	0	0
Indefinite-lived intangibles - permits	0	0
Other intangibles, net	0	0
Goodwill	0	0
Intercompany notes receivable	(962,000)	(962,000)
Due from iHeartCommunications	(1,051,349)	(885,701)
Investment in subsidiaries	6,973,187	6,756,487
Other assets	(392,990)	(578,380)
Total Assets	3,320,418	4,115,325
Accounts payable	0	0
Accrued expenses	(14,771)	0
Intercompany payable	(916,769)	(169,721)
Accrued interest	(19,379)	(49,032)
Deferred income	0	0
Current portion of long-term debt	(334,245)	0
Total Current Liabilities	(1,285,164)	(218,753)
Long-term debt	(686,982)	(1,014,218)
Due to Clear Channel Outdoor	(1,051,349)	(962,000)
Intercompany long-term debt	(962,000)	(885,701)
Deferred income taxes	21,686	20,155
Other long-term liabilities	0	0
Total member's equity (deficit)	7,284,227	7,175,842
Total Liabilities and Member's Deficit	3,320,418	4,115,325
Parent Company
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Accounts receivable, net of allowance	0	0
Intercompany receivables	0	0
Prepaid expenses	0	0
Assets held for sale		0
Other current assets	0	0
Total Current Assets	0	0
Structures, net	0	0
Other property, plant and equipment, net	0	0
Indefinite-lived intangibles - licenses	0	0
Indefinite-lived intangibles - permits	0	0
Other intangibles, net	0	0
Goodwill	0	0
Intercompany notes receivable	0	0
Due from iHeartCommunications	0	0
Investment in subsidiaries	(11,568,324)	(11,092,696)
Other assets	0	0
Total Assets	(11,568,324)	(11,092,696)
Accounts payable	0	0
Accrued expenses	0	0
Intercompany payable	0	0
Accrued interest	0	0
Deferred income	0	0
Current portion of long-term debt	0	0
Total Current Liabilities	0	0
Long-term debt	0	0
Due to Clear Channel Outdoor	0	0
Intercompany long-term debt	0	0
Deferred income taxes	0	0
Other long-term liabilities	0	0
Total member's equity (deficit)	(11,568,324)	(11,092,696)
Total Liabilities and Member's Deficit	(11,568,324)	(11,092,696)
Subsidiary Issuer
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	1	3	4	6
Accounts receivable, net of allowance	0	0
Intercompany receivables	0	43,104
Prepaid expenses	282	1,978
Assets held for sale		0
Other current assets	292	1,500
Total Current Assets	575	46,585
Structures, net	0	0
Other property, plant and equipment, net	0	0
Indefinite-lived intangibles - licenses	0	0
Indefinite-lived intangibles - permits	0	0
Other intangibles, net	0	0
Goodwill	0	0
Intercompany notes receivable	962,000	962,000
Due from iHeartCommunications	0	0
Investment in subsidiaries	5,909,674	5,311,913
Other assets	11,770	10,733
Total Assets	6,884,019	6,331,231
Accounts payable	0	0
Accrued expenses	(93,975)	(137,084)
Intercompany payable	748,372	0
Accrued interest	161,960	312,661
Deferred income	0	0
Current portion of long-term debt	940,428	330,000
Total Current Liabilities	1,756,785	505,577
Long-term debt	15,399,097	15,898,073
Due to Clear Channel Outdoor	1,051,349	0
Intercompany long-term debt	0	885,701
Deferred income taxes	224,452	114,925
Other long-term liabilities	20,687	19,650
Total member's equity (deficit)	(11,568,351)	(11,092,695)
Total Liabilities and Member's Deficit	6,884,019	6,331,231
Guarantor Subsidiaries
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	55,093	277,210	119,219	347,863
Accounts receivable, net of allowance	797,391	768,740
Intercompany receivables	916,769	126,617
Prepaid expenses	97,570	70,269
Assets held for sale		0
Other current assets	149,090	40,368
Total Current Assets	2,015,913	1,283,204
Structures, net	0	0
Other property, plant and equipment, net	507,049	534,831
Indefinite-lived intangibles - licenses	2,399,680	2,413,899
Indefinite-lived intangibles - permits	0	0
Other intangibles, net	309,178	435,606
Goodwill	3,366,558	3,366,558
Intercompany notes receivable	0	0
Due from iHeartCommunications	0	0
Investment in subsidiaries	(1,314,537)	(975,704)
Other assets	343,237	285,924
Total Assets	7,627,078	7,344,318
Accounts payable	68,867	55,429
Accrued expenses	296,837	367,105
Intercompany payable	80,422	43,104
Accrued interest	(1)	0
Deferred income	121,893	130,136
Current portion of long-term debt	12,247	5,937
Total Current Liabilities	580,265	601,711
Long-term debt	19,492	28,205
Due to Clear Channel Outdoor	0	962,000
Intercompany long-term debt	962,000	0
Deferred income taxes	609,587	684,981
Other long-term liabilities	310,946	314,959
Total member's equity (deficit)	5,144,788	4,752,462
Total Liabilities and Member's Deficit	7,627,078	7,344,318
Non-Guarantor Subsidiaries
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	231,276	567,817	$ 423,687	$ 424,809
Accounts receivable, net of allowance	635,628	595,664
Intercompany receivables	0	0
Prepaid expenses	132,357	112,339
Assets held for sale		55,602
Other current assets	258,155	58,557
Total Current Assets	1,257,416	1,389,979
Structures, net	1,152,066	1,196,676
Other property, plant and equipment, net	228,948	216,655
Indefinite-lived intangibles - licenses	8,504	0
Indefinite-lived intangibles - permits	977,152	960,966
Other intangibles, net	287,109	304,902
Goodwill	717,031	700,017
Intercompany notes receivable	0	0
Due from iHeartCommunications	1,051,349	885,701
Investment in subsidiaries	0	0
Other assets	314,494	509,173
Total Assets	5,994,069	6,164,069
Accounts payable	88,350	87,171
Accrued expenses	530,367	494,772
Intercompany payable	87,975	126,617
Accrued interest	6,953	541
Deferred income	93,517	69,967
Current portion of long-term debt	573	6,971
Total Current Liabilities	807,735	786,039
Long-term debt	5,264,290	5,110,020
Due to Clear Channel Outdoor	0	0
Intercompany long-term debt	0	0
Deferred income taxes	605,157	637,034
Other long-term liabilities	286,942	259,364
Total member's equity (deficit)	(970,055)	(628,388)
Total Liabilities and Member's Deficit	$ 5,994,069	$ 6,164,069