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Income Taxes (Details 5) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Tax balances presented in accompanying consolidated balance sheets    
Current deferred income tax assets $ 117,576 $ 88,508
Intangibles and other assets 28,050 8,174
Accrued liabilities (1,331) (1,430)
Deferred income tax liabilities (198,353) (120,934)
Net deferred tax liabilities $ (54,058) $ (25,682)