Gross amount, as of the balance sheet date, of the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable), in excess of the fair value of net assets acquired in one or more business combination transactions.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 3

-Subparagraph (b)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Goodwill and Intangible Assets (Details) (USD $)	6 Months Ended	3 Months Ended
Goodwill and Intangible Assets (Details) (USD $)	Jun. 30, 2013 Guitar Center	Jun. 30, 2013 Trademarks and trade names	Jun. 30, 2013 Music & Arts	Jun. 30, 2013 Guitar Center	Dec. 31, 2012 Guitar Center
Change in goodwill by segment
Goodwill			$ 200,000	$ 706,200,000	$ 706,200,000
Accumulated impairment losses				123,800,000	123,800,000
Impairment of finite-lived intangible assets	0
Impairment of indefinite-lived intangible assets		$ 2,300,000