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Long-term Debt - Long-Term Debt (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Total debt	$ 18,230	$ 18,480
Less current maturities	1,000	1,000
Total long-term debt	17,230	17,480
Timet Finance Management Company [Member]
Debt Instrument [Line Items]
Total debt	$ 18,230	$ 18,480

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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