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Notes Payable and Other Noncurrent Liabilities - Payments Due under Notes Payable (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Long Term Debt Maturity [Line Items]
2013	$ 6,601
2014	6,607
2015	6,616
2016	6,625
2017	6,636
Thereafter	66,616
Notes Payable, Total	$ 99,701

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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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