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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash flows from operating activities      
Net income (loss) $ 10,833,215 $ (1,222,682) $ 1,879,619
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 19,214,069 15,343,804 14,621,237
Gain on disposal of property and equipment (441,524) (39,725) (221,156)
Non-cash compensation 483,769 508,254 512,730
Deferred income taxes 2,469,953 146,550 717,873
Changes in operating assets and liabilities      
Trade accounts receivable (2,442,223) (7,377,921) (2,352,493)
Cost and estimated earnings in excess of billings on uncompleted contracts (589,429) (4,098,234) 1,875,709
Prepaid expenses and other 2,326,499 1,384,007 2,187,472
Prepaid federal and state income tax 1,145,437 (239,844) 1,044,631
Other assets (18,035) (27,495) 16,730
Trade accounts payable 2,763,004 1,944,647 (1,115,265)
Accrued liabilities 823,278 443,628 230,476
Billings in excess of cost and estimated earnings on uncompleted contracts (4,550,293) (1,604,706) 1,300,559
Federal and state income tax payable 2,156,447    
Net cash provided by operating activities 34,174,167 5,160,283 20,698,122
Cash flows from investing activities      
Capital expenditures (22,011,503) (8,220,293) (1,349,972)
Purchase of stock of Eagle Canada, Inc.     (10,345,000)
Net cash inflow on acquisition of subsidiary     370,822
Proceeds from sale of property and equipment 740,658 164,323 381,986
Net cash used in investing activities (21,270,845) (8,055,970) (10,942,164)
Cash flows from financing activities      
Principal payments on notes payable (9,006,101) (8,448,138) (7,296,477)
Principal payments on capital lease obligations (1,348,164) (1,101,242) (1,080,217)
Proceeds from exercise of stock options 181,505   9,600
Purchase of treasury shares (71)    
Payment of dividends   (431) (385)
Net cash used in financing activities (10,172,831) (9,549,811) (8,367,479)
Net increase (decrease) in cash and cash equivalents 2,730,491 (12,445,498) 1,388,479
Effect of exchange rates on cash (57,435) 13,852 1,319
Cash and cash equivalents at beginning of year 13,072,503 25,504,149 24,114,351
Cash and cash equivalents at end of year 15,745,559 13,072,503 25,504,149
Supplemental cash flow information      
Interest paid 784,425 790,417 1,020,681
Income taxes paid 774,136 1,479,446 1,722,914
Noncash investing and financing activities      
Capital lease obligations incurred 1,953,263 2,030,175 609,734
Financed equipment purchase 6,765,619 4,975,110  
Financed insurance premiums 2,336,121 2,206,655 2,087,288
Restricted stock awards to employees net of cancellations 101,475 20,750 24,350
Stock awards to employees 225,000    
Cash used in the purchase of Eagle Canada consisted of the following:      
Cash and cash equivalents     (370,822)
Trade accounts receivable     (1,245,336)
Other current assets     (861,911)
Deferred tax asset     (1,097,088)
Fixed assets     (9,940,118)
Goodwill     (1,226,992)
Current liabilities     918,390
Notes payable     1,496,494
Capital lease obligations     433,517
Long-term deferred tax liability     1,548,866
Purchase of stock of Eagle Canada, Inc.     $ (10,345,000)