Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended								12 Months Ended						1 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 First Three Percent Of Contributions On Defined Contribution Plan	Dec. 31, 2012 Next Two Percent Of Contributions On Defined Contribution Plan	Dec. 31, 2012 Defined Contribution 401 K Plan	Dec. 31, 2011 Defined Contribution 401 K Plan	Jul. 31, 2011 Noncompete Agreements	Dec. 31, 2012 Noncompete Agreements	Jul. 08, 2011 Eleets Transportation Company Inc	Dec. 31, 2012 Common Stock Equivalents	Dec. 31, 2011 Common Stock Equivalents	Dec. 31, 2012 Minimum	Dec. 31, 2012 Maximum
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