No authoritative reference available.

No definition available.

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- Definition

Represents gains or losses resulting from transactions conducted in foreign currencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6939497&loc=d3e30226-110892

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- Definition

This item represents the amount of net sales proceeds received on disposal of an equity method investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 35

-URI http://asc.fasb.org/extlink&oid=35687916&loc=d3e32847-111569

+ Details

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- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 32

-URI http://asc.fasb.org/extlink&oid=35687916&loc=d3e32787-111569

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Balance Type:	debit
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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

+ References

No definition available.

+ Details

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Investments (Narrative) (Detail) (USD $)	12 Months Ended		3 Months Ended
Investments (Narrative) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2014	Feb. 18, 2014	Jul. 18, 2014
Sale of Equity Method Investment [Abstract]
Proceeds from sale of equity method investment	$ (236,603,000)
Other than temporary impairment for equity method investments	(11,146,000)	76,000
Australian Radio Network [Member]
Percentage of ownership	50.00%
Equity Method Ownership Percentage Disposal						50.00%
Sale of Equity Method Investment [Abstract]
Other than temporary impairment for equity method investments				95,400,000
Equity Method Investment, Realized Gain (Loss) on Disposal			(2,400,000)
Australian Radio Network [Member] \| Reclassification out of Accumulated Other Comprehensive Income [Member]
Sale of Equity Method Investment [Abstract]
Foreign exchange losses			11,500,000
Buspak [Member]
Percentage of ownership	50.00%
Equity Method Ownership Percentage Disposal							50.00%
Sale of Equity Method Investment [Abstract]
Equity Method Investment, Realized Gain (Loss) on Disposal					$ 4,500,000