Annual report pursuant to Section 13 and 15(d)

Income Taxes (Statutory tax rate impact on Income tax expense) (Details)

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Income Taxes (Statutory tax rate impact on Income tax expense) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]      
Expected statutory tax expense $ 14,939 $ 7,437 $ 4,500
Impact of non-controlling interest attributable to non-tax paying entity (7,977) 0 0
State income taxes, net of federal expense 1,690 1,770 1,141
Income tax effect of nondeductible entertainment expenses 1,045 777 737
Income tax effect of nondeductible lobbying expenses 369 298 327
Income tax effect of nondeductible officer compensation 824 1,718 758
Other, net 67 88 (58)
Income Tax Expense (Benefit), Total $ 10,957 $ 12,088 $ 7,405