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CONSOLIDATED BALANCE SHEETS (USD $)
Sep. 30, 2012
Dec. 31, 2011
CURRENT ASSETS    
Cash and cash equivalents $ 21,481,441 $ 15,745,559
Trade accounts receivable 27,778,928 19,351,023
Cost and estimated earnings in excess of billings on uncompleted contracts 2,133,882 5,101,478
Prepaid expenses and other 2,956,917 1,606,936
Total current assets 54,351,168 41,804,996
PROPERTY AND EQUIPMENT - at cost    
Machinery and equipment 176,893,034 139,017,290
Automobiles and trucks 14,236,510 12,616,608
Furniture and fixtures 489,520 434,146
Leasehold improvements 14,994 14,994
Total property and equipment, gross 191,634,058 152,083,038
Less accumulated depreciation and amortization (110,712,036) (94,286,207)
Total property and equipment, net 80,922,022 57,796,831
Goodwill 201,530 201,530
Other assets 89,585 77,870
Total noncurrent assets 291,115 279,400
Total assets 135,564,305 99,881,227
CURRENT LIABILITIES    
Trade accounts payable 12,437,945 9,256,392
Accrued liabilities 4,306,002 2,598,126
Billings in excess of costs and estimated earnings on uncompleted contracts 5,248,177 937,755
Federal and state income taxes payable 4,867,629 2,017,644
Current maturities of notes payable 9,390,449 5,802,513
Current portion of capital lease obligations 1,933,121 1,336,037
Total current liabilities 38,183,323 21,948,467
NOTES PAYABLE, less current maturities 11,952,489 5,328,892
CAPITAL LEASE OBLIGATIONS, less current portion 1,739,744 1,626,612
LONG-TERM DEFERRED TAX LIABILITY 6,144,477 7,257,576
COMMITMENTS AND CONTINGENCIES      
SHAREHOLDERS' EQUITY    
Preferred stock, $1.00 par value; 4,000,000 shares authorized; issued - none      
Common stock, $.01 par value; 25,000,000 shares authorized; 20,732,500 and 19,348,436 in each period 207,325 193,484
Additional paid-in capital 29,353,883 28,176,922
Retained earnings 47,021,322 35,499,541
Treasury stock, at cost, 80,076 and 37,820 shares in each period (691,009) (257,394)
Accumulated other comprehensive income 1,652,751 107,127
Total shareholders' equity 77,544,272 63,719,680
Total liabilities and shareholders' equity $ 135,564,305 $ 99,881,227