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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 01, 2012
Jul. 03, 2011
Jul. 01, 2012
Jul. 03, 2011
Reconciliation of the income tax expense at the statutory federal rate to actual income tax expense        
Statutory expense     $ 10,161 $ 10,479
State income taxes, net of federal effect     1,257 1,305
Valuation allowance adjustment     774 0
Noncontrolling interest - Piedmont     (788) (626)
Manufacturing deduction benefit     (852) (867)
Meals and entertainment     602 442
Adjustment for uncertain tax positions     358 363
Other, net     525 239
Income tax expense $ 7,570 $ 7,394 $ 12,037 $ 11,335