Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Changes in Unrecognized Tax Benefits (Detail)

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Income Taxes - Components of Changes in Unrecognized Tax Benefits (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Unrecognized tax benefits - January 1 $ 3,002 $ 4,440 $ 4,433
Gross increases - tax positions in current period     7
Gross increases - tax positions in prior period 560    
Gross decreases - tax positions in prior period (1,538) (1,438)  
Unrecognized tax benefits - December 31 2,024 3,002 4,440
Amount of unrecognized tax benefit that, if recognized would affect the company's effective tax rate $ 2,024 $ 3,002 $ 4,440