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Carrying Value and Estimated Aggregate Fair Value of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
Debt Disclosure [Line Items]
Carrying Value	$ 317,335	$ 214,017
Fair Value	$ 315,749	$ 209,808

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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