Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
REVENUES
Rental	$ 63,418	$ 60,964	$ 183,327	$ 172,108
Rental Related Services	13,010	10,737	34,703	28,616
Rental Operations	76,428	71,701	218,030	200,724
Sales	22,382	32,783	42,318	55,206
Other	620	388	1,776	1,488
Total Revenues	99,430	104,872	262,124	257,418
Direct Costs of Rental Operations
Depreciation of Rental Equipment	16,163	15,357	47,236	44,794
Rental Related Services	10,252	8,321	27,816	22,201
Other	12,698	10,274	33,856	30,479
Total Direct Costs of Rental Operations	39,113	33,952	108,908	97,474
Costs of Sales	16,677	23,622	28,961	37,392
Total Costs of Revenues	55,790	57,574	137,869	134,866
Gross Profit	43,640	47,298	124,255	122,552
Selling and Administrative Expenses	20,848	19,992	63,372	57,238
Income from Operations	22,792	27,306	60,883	65,314
Interest Expense	2,312	2,051	6,867	5,487
Income Before Provision for Income Taxes	20,480	25,255	54,016	59,827
Provision for Income Taxes	8,029	9,900	21,175	23,452
Net Income	$ 12,451	$ 15,355	$ 32,841	$ 36,375
Earnings Per Share:
Basic	$ 0.50	$ 0.63	$ 1.33	$ 1.50
Diluted	$ 0.50	$ 0.62	$ 1.31	$ 1.47
Shares Used in Per Share Calculation:
Basic	24,785	24,362	24,730	24,320
Diluted	25,106	24,719	25,133	24,702
Cash Dividends Declared Per Share	$ 0.235	$ 0.230	$ 0.705	$ 0.690