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Taxes On Income (Reconciliation from the Expected Tax Expense (Benefit) Using the U.S. Federal Income Tax Rate) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Computed tax (benefit) expense at statutory rates $ 9,867 $ 9,124 $ (39,183)
Increase (decrease) in income taxes results from:      
Benefit of income not subject to U.S. Federal income tax (213) (213) (165)
Expenses not deductible for U.S. Federal income tax 96 150 124
State income taxes, net of Federal income tax benefit 749 476 (3,755)
Reversal of FIN 48 Reserve     (953)
Texas tax refund (federally tax affected)   50  
Other 181 296 275
Income Tax Expense (Benefit), Total 10,756 9,883 (43,657)
Tax Credit Recapture 76    
Parent Company [Member]
     
Increase (decrease) in income taxes results from:      
Income Tax Expense (Benefit), Total $ (2,027) $ (2,900) $ (2,563)