SEGMENT DATA (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 1,582,765	$ 1,536,757	$ 4,553,255	$ 4,455,270
Direct operating expenses	630,264	623,741	1,869,260	1,812,505
Selling, general and administrative expenses	457,757	438,796	1,382,234	1,337,091
Corporate expenses	84,193	77,967	242,553	233,487
Depreciation and amortization	120,700	149,749	419,778	443,650
Impairment charges	40,922	7,631	40,922	7,631
Other operating income, net	(1,637)	(13,215)	(5,212)	24,785
Operating income	247,292	225,658	593,296	645,691
Capital expenditures	68,948	48,324	157,569	184,944
Share-based compensation expense	3,588	3,539	8,385	9,020
Operating segments \| iHM
Segment Reporting Information [Line Items]
Revenue	873,404	859,531	2,471,239	2,501,084
Direct operating expenses	268,606	265,795	773,424	773,327
Selling, general and administrative expenses	303,451	287,676	929,308	894,669
Corporate expenses	0	0	0	0
Depreciation and amortization	34,882	58,089	149,714	174,946
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income	266,465	247,971	618,793	658,142
Capital expenditures	17,750	14,009	42,211	44,353
Share-based compensation expense	0	0	0	0
Operating segments \| Americas Outdoor
Segment Reporting Information [Line Items]
Revenue	303,421	293,807	859,190	854,344
Direct operating expenses	131,241	130,269	386,427	393,953
Selling, general and administrative expenses	49,247	49,007	146,021	148,824
Corporate expenses	0	0	0	0
Depreciation and amortization	39,783	44,457	127,410	130,127
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income	83,150	70,074	199,332	181,440
Capital expenditures	25,826	4,397	50,214	46,394
Share-based compensation expense	0	0	0	0
Operating segments \| International Outdoor
Segment Reporting Information [Line Items]
Revenue	360,318	350,623	1,114,927	1,005,954
Direct operating expenses	230,440	227,677	709,479	645,222
Selling, general and administrative expenses	79,550	79,532	235,473	221,773
Corporate expenses	0	0	0	0
Depreciation and amortization	36,627	35,464	113,875	102,711
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income	13,701	7,950	56,100	36,248
Capital expenditures	21,921	26,932	57,487	86,206
Share-based compensation expense	0	0	0	0
Operating segments \| Other
Segment Reporting Information [Line Items]
Revenue	47,088	34,452	113,803	99,332
Direct operating expenses	0	0	0	3
Selling, general and administrative expenses	25,985	23,298	74,420	74,519
Corporate expenses	0	0	0	0
Depreciation and amortization	3,222	3,893	10,242	11,097
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income	17,881	7,261	29,141	13,713
Capital expenditures	896	184	1,083	551
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	85,160	78,906	245,399	236,237
Depreciation and amortization	6,186	7,846	18,537	24,769
Impairment charges	40,922	7,631	40,922	7,631
Other operating income, net	(1,637)	(13,215)	(5,212)	24,785
Operating income	(133,905)	(107,598)	(310,070)	(243,852)
Capital expenditures	2,555	2,802	6,574	7,440
Share-based compensation expense	3,588	3,539	8,385	9,020
Eliminations
Segment Reporting Information [Line Items]
Revenue	(1,466)	(1,656)	(5,904)	(5,444)
Direct operating expenses	(23)	0	(70)	0
Selling, general and administrative expenses	(476)	(717)	(2,988)	(2,694)
Corporate expenses	(967)	(939)	(2,846)	(2,750)
Depreciation and amortization	0	0	0	0
Impairment charges	0	0	0	0
Other operating income, net	0	0	0	0
Operating income	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	1,466	1,656	5,904	5,444
Intersegment revenues \| iHM
Segment Reporting Information [Line Items]
Revenue	23	0	84	0
Intersegment revenues \| Americas Outdoor
Segment Reporting Information [Line Items]
Revenue	1,443	1,656	5,820	5,444
Intersegment revenues \| International Outdoor
Segment Reporting Information [Line Items]
Revenue	$ 0	$ 0	0	0
Intersegment revenues \| Other
Segment Reporting Information [Line Items]
Revenue			$ 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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