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Investments - Debt, Equity and Other Securities - Summary of the Company's Debt, Equity and Other Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Investments Debt And Equity Securities [Abstract]    
Marketable securities $ 7,668 $ 2,427
Cost method 32,681 33,524
Total $ 40,349 $ 35,951