Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets:
Inventory	$ 29,523	$ 22,267
Accrued expenses and reserves	27,361	18,357
Accounts receivable	10,037	10,860
Stock-based compensation	9,442	8,945
Qualified and nonqualified retirement plans	7,476	5,157
Net operating loss carryforwards	4,451	4,722
Interest rate swaps	5,461	3,679
Other	4,711	8,621
Total deferred tax assets, gross	98,462	82,608
Less valuation allowance	(1,631)	(1,911)
Total deferred tax assets	96,831	80,697
Deferred Tax Liabilities:
Goodwill and other intangible assets	64,704	46,373
Property and equipment	48,994	44,535
Trade name	30,336	32,592
Other	1,428	1,864
Total deferred tax liabilities	145,462	125,364
Net deferred tax liability	$ (48,631)	$ (44,667)

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimated losses reflected in the allowance for doubtful accounts, which can only be deducted for tax purposes when actual bad debts are known, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. In addition, the tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimated returns and allowances, which can only be deducted for tax purposes when actual returns occur and allowances are granted, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deductions to be taken.

No definition available.