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Income Taxes (Summary Of Temporary Differences That Give Rise To Deferred Income Tax Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]    
Inventory costing and valuation methods $ 3,834 $ 4,045
Allowance for doubtful accounts receivable 3,586 2,618
Insurance claims payable 10,594 7,825
Promotions payable 1,240 945
Accrued legal reserves 309 207
Stock-based compensation 5,974 4,715
Federal and state benefit of uncertain tax positions 1,158 1,871
Foreign net operating loss and credit carryforwards 5,089 3,309
Foreign valuation allowances (2,819) (2,090)
Other, net (1,482) (952)
Total deferred income tax assets 27,483 22,493
Property and equipment (72,490) (59,371)
Total deferred income tax liabilities (72,490) (59,371)
Net deferred income tax assets (liabilities) $ (45,007) $ (36,878)