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CONSOLIDATED BALANCE SHEETS (USD $)
Mar. 31, 2012
Dec. 31, 2011
CURRENT ASSETS    
Cash and cash equivalents $ 10,661,739 $ 15,745,559
Trade accounts receivable 54,411,908 19,351,023
Cost and estimated earnings in excess of billings on uncompleted contracts 3,294,079 5,101,478
Prepaid expenses and other 1,089,306 1,606,936
Total current assets 69,457,032 41,804,996
PROPERTY AND EQUIPMENT - at cost    
Machinery and equipment 156,463,122 139,017,290
Automobiles and trucks 13,329,331 12,616,608
Furniture and fixtures 435,228 434,146
Leasehold improvements 14,994 14,994
Total property and equipment, gross 170,242,675 152,083,038
Less accumulated depreciation and amortization (99,586,763) (94,286,207)
Total property and equipment, net 70,655,912 57,796,831
Goodwill 201,530 201,530
Other assets 81,714 77,870
Total noncurrent assets 283,244 279,400
Total assets 140,396,188 99,881,227
CURRENT LIABILITIES    
Trade accounts payable 20,001,143 9,256,392
Accrued liabilities 4,781,590 2,598,126
Billings in excess of costs and estimated earnings on uncompleted contracts 4,324,061 937,755
Federal and state income taxes payable 6,922,803 2,017,644
Current maturities of notes payable 6,698,132 5,802,513
Current portion of capital lease obligations 1,868,346 1,336,037
Total current liabilities 44,596,075 21,948,467
NOTES PAYABLE, less current maturities 10,198,395 5,328,892
CAPITAL LEASE OBLIGATIONS, less current portion 1,583,554 1,626,612
LONG-TERM DEFERRED TAX LIABILITY 7,166,342 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; 19,473,903 and 19,348,436 in each period 194,739 193,484
Additional paid-in capital 28,746,917 28,176,922
Retained earnings 47,883,802 35,499,541
Treasury stock, at cost, 71,074 and 37,820 shares in each period (598,927) (257,394)
Accumulated other comprehensive income (loss) 625,291 107,127
Total shareholders' equity 76,851,822 63,719,680
Total liabilities and shareholders' equity $ 140,396,188 $ 99,881,227