Annual report pursuant to Section 13 and 15(d)

Components of Income Tax Expense (Detail)

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Components of Income Tax Expense (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]      
Current $ (2,146) $ (40,562) $ 29,682
Deferred 30,920 88,109 61,835
Income tax expense (benefit) $ 28,774 $ 47,547 $ 91,517