SEGMENT DATA (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenue	$ 1,537,416	$ 1,566,582	$ 4,457,106	$ 4,542,852
Direct operating expenses	621,895	591,740	1,807,534	1,771,590
Selling, general and administrative expenses	438,654	421,700	1,336,563	1,281,849
Corporate expenses	77,967	86,832	233,487	252,348
Depreciation and amortization	149,749	158,453	443,650	476,053
Impairment charges	7,631	8,000	7,631	8,000
Other operating income, net	(13,215)	(505)	24,785	219,768
Operating income (loss)	228,305	299,352	653,026	972,780
Capital expenditures	48,324	77,333	184,944	201,038
Share-based compensation expense	3,539	3,484	9,020	10,350
Operating segments \| iHM
Segment Reporting Information [Line Items]
Revenue	859,531	857,099	2,501,084	2,463,899
Direct operating expenses	265,795	229,668	773,327	704,097
Selling, general and administrative expenses	287,676	268,612	894,669	812,344
Corporate expenses	0	0	0	0
Depreciation and amortization	58,089	60,691	174,946	182,506
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income (loss)	247,971	298,128	658,142	764,952
Capital expenditures	14,009	23,238	44,353	46,303
Share-based compensation expense	0	0	0	0
Operating segments \| Americas Outdoor
Segment Reporting Information [Line Items]
Revenue	316,587	322,997	919,967	931,058
Direct operating expenses	141,609	142,989	427,181	421,039
Selling, general and administrative expenses	54,689	54,500	165,538	167,660
Corporate expenses	0	0	0	0
Depreciation and amortization	47,035	47,242	137,689	140,883
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income (loss)	73,254	78,266	189,559	201,476
Capital expenditures	5,118	19,114	48,749	47,808
Share-based compensation expense	0	0	0	0
Operating segments \| International Outdoor
Segment Reporting Information [Line Items]
Revenue	328,502	346,224	942,167	1,035,263
Direct operating expenses	214,491	219,261	607,023	645,199
Selling, general and administrative expenses	73,708	71,664	204,531	220,872
Corporate expenses	0	0	0	0
Depreciation and amortization	32,886	37,018	95,149	113,075
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income (loss)	7,417	18,281	35,464	56,117
Capital expenditures	26,211	30,803	83,851	97,487
Share-based compensation expense	0	0	0	0
Operating segments \| Other
Segment Reporting Information [Line Items]
Revenue	34,452	41,414	99,332	114,663
Direct operating expenses	0	(178)	3	1,255
Selling, general and administrative expenses	23,298	27,466	74,519	82,394
Corporate expenses	0	0	0	0
Depreciation and amortization	3,893	4,483	11,097	12,809
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income (loss)	7,261	9,643	13,713	18,205
Capital expenditures	184	582	551	1,758
Share-based compensation expense	0	0	0	0
Corporate and other reconciling items
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Direct operating expenses	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Corporate expenses	78,906	87,442	236,237	252,958
Depreciation and amortization	7,846	9,019	24,769	26,780
Impairment charges	7,631	8,000	7,631	8,000
Other operating income, net	(13,215)	(505)	24,785	219,768
Operating income (loss)	(107,598)	(104,966)	(243,852)	(67,970)
Capital expenditures	2,802	3,596	7,440	7,682
Share-based compensation expense	3,539	3,484	9,020	10,350
Eliminations
Segment Reporting Information [Line Items]
Revenue	(1,656)	(1,152)	(5,444)	(2,031)
Direct operating expenses	0	0	0	0
Selling, general and administrative expenses	(717)	(542)	(2,694)	(1,421)
Corporate expenses	(939)	(610)	(2,750)	(610)
Depreciation and amortization	0	0	0	0
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income (loss)	0	0	0	0
Capital expenditures	0	0	0	0
Share-based compensation expense	0	0	0	0
Intersegment revenues
Segment Reporting Information [Line Items]
Revenue	1,656	1,152	5,444	2,031
Intersegment revenues \| iHM
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Intersegment revenues \| Americas Outdoor
Segment Reporting Information [Line Items]
Revenue	1,656	1,152	5,444	2,031
Intersegment revenues \| International Outdoor
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	$ 0	$ 0

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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