Annual report pursuant to Section 13 and 15(d)

Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details)

v2.4.0.6
Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]    
Claims and insurance reserves $ 33,424 $ 30,823
Allowance for doubtful accounts 2,827 2,642
Accrued vacation 9,339 8,332
Deferred compensation 14,441 12,204
Other 11,036 6,652
Total deferred tax assets 71,067 60,653
Depreciation (174,353) (122,950)
Unrecognized revenue (6,995) (6,084)
Employee benefits (3,421) (2,544)
Other (1,748) (1,177)
Total deferred tax liabilities (186,517) (132,755)
Net deferred tax liability $ (115,450) $ (72,102)