Fair Value Measurements (Details) (USD $)	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013
Total Losses
Goodwill	$ 360,100,000		$ 360,100,000
Guitar Center
Total Losses
Goodwill	360,100,000	0	360,100,000
Trademarks and trade names			0
Non-recurring basis | Guitar Center
Total Losses
Goodwill			360,100,000
Non-recurring basis | Direct Response
Total Losses
Trademarks and trade names			2,300,000
Non-recurring basis | Level 3 | Guitar Center
Fair value measurements
Goodwill	222,278,000		222,278,000
Non-recurring basis | Level 3 | Direct Response
Fair value measurements
Trademarks and trade names	7,400,000		7,400,000
Non-recurring basis | Total | Guitar Center
Fair value measurements
Goodwill	222,278,000		222,278,000
Non-recurring basis | Total | Direct Response
Fair value measurements
Trademarks and trade names	$ 7,400,000		$ 7,400,000