Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details)

v2.4.0.6
Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Current: [Abstract]      
Federal $ 20,841 $ 16,816 $ 10,711
State 3,175 2,811 2,017
Current Income Tax Expense (Benefit) 24,016 19,627 12,728
Deferred: [Abstract]      
Federal 4,640 1,566 (4,310)
State 710 (130) (271)
Deferred Income Tax Expense (Benefit) 5,350 1,436 (4,581)
Income tax expense (benefit) 29,366 21,063 8,147
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation 747 194 (370)
Income tax provision [Abstract]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00%    
Tax expense at the statutory rate 26,798 18,585 6,282
State income taxes, net of federal benefit 2,542 1,790 1,135
Qualified stock options 472 516 659
Meals and entertainment 207 186 176
Deferred tax asset valuation allowance (17) (124) 183
Federal income tax credits (675) 0 (269)
Other 39 110 (19)
Income tax expense (benefit) 29,366 21,063 8,147
Deferred Tax Liabilities and Assets [Abstract]      
Accrued expenses 5,711 4,669  
Allowance for doubtful accounts 588 772  
Non-compete agreements 2,779 2,227  
Share-based compensation 6,326 5,101  
Accruals for income tax contingencies 56 114  
Impairment of goodwill and other intangible assets 1,501 1,805  
Net operating loss carryforwards 343 444  
Total deferred tax assets 17,304 15,132  
Valuation allowance (348) (335)  
Total deferred tax assets, net of valuation allowance 16,956 14,797  
Tax over book depreciation 17,289 11,541  
Prepaid expenses deductible when paid 1,868 1,463  
Goodwill 6,914 5,760  
Total deferred tax liabilities 26,071 18,764  
Net deferred tax liabilities (9,115) (3,967)  
Balance sheet classification of deferred income taxes [Abstract]      
Deferred tax assets, net, current 2,011 2,149  
Deferred tax liabilites, noncurrent (11,126) (6,116)  
Income taxes paid 19,891 20,944 7,888
State net operating loss carryforwards 8,163 10,084  
Potentially Unrealizable Net Operating Loss Carryforwards 7,332    
State operating loss carryforwards, valuation allowance 309    
Increase (Decrease) in valuation allowance for state loss carryforwards 17    
Deferred tax assets, valuation allowance 39    
Reconciliation of Unrecognized Tax Benefits [Roll Forward]      
Balance at beginning of year 725 642 428
Additions for tax positions of current year 75 41 71
Additions for tax positions of prior years   190 143
Reductions for settlement with state taxing authorities (169) (148)  
Reductions for tax positions of prior years (29)    
Reductions for lapse of statute of limitations (121)    
Balance at end of year 481 725 642
Expected changes in unrecognized tax benefits in next 12 months, minimum 200    
Expected changes in unrecognized tax benefits in next 12 months, maximum 300    
Income tax penalties accrued 57    
Interest on income taxes accrued 169 113  
Valuation Allowance, Operating Loss Carryforwards [Member]
     
Balance sheet classification of deferred income taxes [Abstract]      
Increase (Decrease) in valuation allowance for state loss carryforwards $ 30