XML 27 R31.htm IDEA: XBRL DOCUMENT

Fair Value Measurements - Additional Information (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Debt instrument, carrying value	$ 9,200,000	$ 9,600,000

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.

+ References+ Details