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Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | |||||||||||||||
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2012
First Three Percent Of Contributions On Defined Contribution Plan
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Dec. 31, 2012
Next Two Percent Of Contributions On Defined Contribution Plan
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Dec. 31, 2012
Defined Contribution 401 K Plan
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Dec. 31, 2011
Defined Contribution 401 K Plan
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Jul. 31, 2011
Noncompete Agreements
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Dec. 31, 2012
Noncompete Agreements
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Jul. 08, 2011
Eleets Transportation Company Inc
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Dec. 31, 2012
Common Stock Equivalents
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Dec. 31, 2011
Common Stock Equivalents
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Dec. 31, 2012
Minimum
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Dec. 31, 2012
Maximum
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| Significant Accounting Policies [Line Items] | |||||||||||||||||||||
| Percentage of revenue earned | 100.00% | ||||||||||||||||||||
| Business Acquisition Purchase Price Allocation Assets Acquired | $ 10,000,000 | ||||||||||||||||||||
| Business Acquisition Purchase Price Allocation Liabilities Assumed of Certain Liabilities | 9,400,000 | ||||||||||||||||||||
| Revenues | 75,318,000 | 71,856,000 | 69,197,000 | 61,800,000 | 72,167,000 | 85,359,000 | 86,965,000 | 75,479,000 | 278,171,000 | 319,970,000 | |||||||||||
| Income from operations | 7,418,000 | 6,432,000 | |||||||||||||||||||
| Net income | 1,050,000 | 1,390,000 | 1,085,000 | 831,000 | 1,128,000 | 944,000 | 905,000 | 661,000 | 4,356,000 | 3,638,000 | |||||||||||
| Estimated Useful lives of Fixed Assets | 5 years | 3 years | 5 years | ||||||||||||||||||
| Estimated Useful Life of Other Intangible Assets | 3 years | ||||||||||||||||||||
| Defined Benefit Plan Employee Contribution Percentage | 50.00% | 5.00% | |||||||||||||||||||
| Defined Benefit Plan Employer Matching Percent of Employee Contribution | 100.00% | ||||||||||||||||||||
| Defined Benefit Plan Maximum Percentage of Employee Contribution | 1.00% | 4.00% | |||||||||||||||||||
| 401(K) expenses charged to Operations | 22,000 | 32,000 | |||||||||||||||||||
| Common stock Shares Outstanding | 34,151,000 | 33,908,000 | 1,878,000 | 1,488,000 | |||||||||||||||||
| Amortization of Intangible Assets | $ 30,000 | ||||||||||||||||||||
| Period For Examination Of Tax Returns | 3 years | ||||||||||||||||||||