Consolidated Statements of Income (USD $) | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | |
| REVENUE | $ 158,956,001 | $ 113,532,992 | $ 439,906,043 | $ 312,541,880 |
| COSTS AND EXPENSES: | ||||
| Transportation costs | 128,336,597 | 92,066,603 | 354,474,127 | 253,982,164 |
| Selling, general, and administrative expenses | 22,994,195 | 15,544,175 | 65,540,057 | 44,091,871 |
| Depreciation and amortization | 2,174,371 | 1,668,478 | 6,152,762 | 5,061,724 |
| INCOME FROM OPERATIONS | 5,450,838 | 4,253,736 | 13,739,097 | 9,406,121 |
| Interest income | 34,164 | 28,653 | 100,480 | 53,860 |
| Interest expense | (4,723) | (9,532) | (15,740) | (43,259) |
| Other, net | (109,714) | (115,481) | (304,031) | (200,088) |
| OTHER EXPENSE | (80,273) | (96,360) | (219,291) | (189,487) |
| INCOME BEFORE PROVISION FOR INCOME TAXES | 5,370,565 | 4,157,376 | 13,519,806 | 9,216,634 |
| INCOME TAX EXPENSE | (1,991,064) | (1,562,221) | (5,003,592) | (3,459,475) |
| NET INCOME | $ 3,379,501 | $ 2,595,155 | $ 8,516,214 | $ 5,757,159 |
| Basic net income per share | $ 0.15 | $ 0.12 | $ 0.38 | $ 0.26 |
| Diluted net income per share | $ 0.15 | $ 0.12 | $ 0.38 | $ 0.26 |