Balance Sheet Components (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Merchandise inventories:
Inventory gross	$ 570,550	$ 553,466
Less inventory reserves	5,591	5,506
Inventory, net	564,959	547,960
Major goods
Merchandise inventories:
Inventory gross	344,673	337,537
Band instruments
Merchandise inventories:
Inventory gross	79,499	76,188
Accessories
Merchandise inventories:
Inventory gross	114,412	110,740
Vintage instruments
Merchandise inventories:
Inventory gross	13,948	13,635
Used major goods
Merchandise inventories:
Inventory gross	$ 18,018	$ 15,366

The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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+ Details