Condensed Statements of Cash Flows (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 6,736	$ 5,059
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,270	8,770
Deferred taxes	3,964	2,085
Stock options and restricted stock expense	812	874
Gain on disposal of assets	(702)	(47)
Changes in current assets and liabilities:
Trade accounts receivables, net	1,326	2,175
Inventory, net	(2,370)	1,437
Prepaid income taxes and prepaid expenses	1,743	(463)
Accounts payable and accrued liabilities	283	1,958
Current income tax liability	74	(1,162)
Deferred income	1,928	1,560
Other	0	(5)
NET CASH PROVIDED BY OPERATING ACTIVITIES	24,064	22,241
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(27,835)	(12,985)
Proceeds from sale of property and equipment	980	47
NET CASH USED IN INVESTING ACTIVITIES	(26,855)	(12,938)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from other long-term liabilities, net	0	(22)
Repayments of long-term debt	0	(2,534)
Repayments of line of credit	(83)	(7,000)
Proceeds from exercise of stock options	198	99
NET CASH PROVIDED BY FINANCING ACTIVITIES	115	(9,457)
NET CHANGE IN CASH	(2,676)	(154)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	19,137	23,017
CASH AND CASH EQUIVALENTS AT END OF PERIOD	16,461	22,863
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	53	202
Income taxes paid	130	2,137
NON-CASH TRANSACTIONS
Transfer of rental equipment to inventory	$ 0	$ 225

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