Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies - Investments in Venezuelan Bonds (Detail)

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Significant Accounting Policies - Investments in Venezuelan Bonds (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]  
Investments in Venezuelan bonds, Other Than Temporary Impairment $ 3,161
Investments in Venezuelan bonds, Market Value 4,092
Venezuelan bonds [Member]
 
Schedule of Available-for-sale Securities [Line Items]  
Investments in Venezuelan bonds, Amortized Costs 7,253
Investments in Venezuelan bonds, Gross Unrealized Gain   
Investments in Venezuelan bonds, Gross Unrealized Loss   
Investments in Venezuelan bonds, Net Unrealized Gain   
Investments in Venezuelan bonds, Other Than Temporary Impairment 3,161
Investments in Venezuelan bonds, Market Value $ 4,092