Consolidated Statements of Operations (Unaudited) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Income Statement [Abstract] | ||||
| Revenue | $ 460,191,903 | $ 449,993,415 | $ 1,309,299,359 | $ 1,105,127,231 |
| Costs and expenses: | ||||
| Transportation costs | 379,329,380 | 362,614,918 | 1,062,432,444 | 894,955,721 |
| Selling, general and administrative expenses | 66,292,712 | 71,318,890 | 206,302,091 | 176,796,987 |
| Depreciation and amortization | 8,543,002 | 7,448,076 | 23,670,711 | 16,572,233 |
| Income from operations | 6,026,809 | 8,611,531 | 16,894,113 | 16,802,290 |
| Interest income | 0 | 0 | 0 | 23,909 |
| Interest expense | (3,565,093) | (3,414,826) | (10,592,654) | (7,803,050) |
| Other expense | 0 | 0 | 0 | (126,295) |
| Interest and other expense | (3,565,093) | (3,414,826) | (10,592,654) | (7,905,436) |
| Income before provision for income taxes | 2,461,716 | 5,196,705 | 6,301,459 | 8,896,854 |
| Income tax expense | (99,666) | (1,738,000) | (1,746,029) | (2,792,000) |
| Net income | $ 2,362,050 | $ 3,458,705 | $ 4,555,430 | $ 6,104,854 |
| Earnings per common share: | ||||
| Basic (in usd per share) | $ 0.08 | $ 0.12 | $ 0.16 | $ 0.23 |
| Diluted (in usd per share) | $ 0.08 | $ 0.11 | $ 0.15 | $ 0.22 |