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, 2012
Dec. 31, 2011
Dec. 31, 2010
Current: [Abstract]      
Federal $ 24,981 $ 20,841 $ 16,816
State 3,462 3,175 2,811
Current Income Tax Expense (Benefit) 28,443 24,016 19,627
Deferred: [Abstract]      
Federal 2,452 4,640 1,566
State (408) 710 (130)
Deferred Income Tax Expense (Benefit) 2,044 5,350 1,436
Income tax expense (benefit) 30,487 29,366 21,063
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation 385 747 194
Income tax provision [Abstract]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate 35.00%    
Tax expense at the statutory rate 29,125 26,798 18,585
State income taxes, net of federal benefit 1,842 2,542 1,790
Qualified stock options 274 472 516
Meals and entertainment 172 207 186
Deferred tax asset valuation allowance (39) (17) (124)
Federal income tax credits (619) (675) 0
Other (268) 39 110
Income tax expense (benefit) 30,487 29,366 21,063
Deferred Tax Liabilities and Assets [Abstract]      
Accrued expenses 4,374 5,711  
Allowance for doubtful accounts 565 588  
Non-compete agreements 3,288 2,779  
Share-based compensation 6,471 6,326  
Accruals for income tax contingencies 56 56  
Impairment of goodwill and other intangible assets 1,170 1,501  
Net operating loss carryforwards 319 343  
Total deferred tax assets 16,243 17,304  
Valuation allowance (319) (348)  
Total deferred tax assets, net of valuation allowance 15,924 16,956  
Tax over book depreciation 16,907 17,289  
Prepaid expenses deductible when paid 2,202 1,868  
Goodwill 7,973 6,914  
Total deferred tax liabilities 27,082 26,071  
Net deferred tax liabilities (11,158) (9,115)  
Balance sheet classification of deferred income taxes [Abstract]      
Deferred tax assets, net, current 1,282 2,011  
Deferred tax liabilites, noncurrent (12,440) (11,126)  
Income taxes paid 32,214 19,891 20,944
State net operating loss carryforwards 7,376 8,163  
Increase (Decrease) in valuation allowance for state loss carryforwards 10 30  
Reconciliation of Unrecognized Tax Benefits [Roll Forward]      
Balance at beginning of year 481 725 642
Additions for tax positions of current year   75 41
(Reductions) Additions for tax positions of prior years   (150) 190
Reductions for settlement with state taxing authorities (204) (169) (148)
Balance at end of year 277 481 725
Income tax penalties accrued 57 57  
Interest on income taxes accrued $ 160 $ 169