Condensed Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
REVENUES
Rental	$ 60,389	$ 57,118	$ 119,909	$ 111,144
Rental Related Services	11,028	9,387	21,693	17,879
Rental Operations	71,417	66,505	141,602	129,023
Sales	11,830	12,489	19,936	22,423
Other	518	515	1,156	1,100
Total Revenues	83,765	79,509	162,694	152,546
Direct Costs of Rental Operations
Depreciation of Rental Equipment	15,672	14,842	31,073	29,437
Rental Related Services	9,011	7,139	17,564	13,880
Other	10,718	10,665	21,158	20,205
Total Direct Costs of Rental Operations	35,401	32,646	69,795	63,522
Costs of Sales	7,584	7,525	12,284	13,770
Total Costs of Revenues	42,985	40,171	82,079	77,292
Gross Profit	40,780	39,338	80,615	75,254
Selling and Administrative Expenses	21,163	18,624	42,524	37,246
Income from Operations	19,617	20,714	38,091	38,008
Interest Expense	2,382	1,954	4,555	3,436
Income Before Provision for Income Taxes	17,235	18,760	33,536	34,572
Provision for Income Taxes	6,756	7,354	13,146	13,552
Net Income	$ 10,479	$ 11,406	$ 20,390	$ 21,020
Earnings Per Share:
Basic	$ 0.42	$ 0.47	$ 0.83	$ 0.87
Diluted	$ 0.42	$ 0.46	$ 0.81	$ 0.85
Shares Used in Per Share Calculation:
Basic	24,765	24,340	24,702	24,299
Diluted	25,149	24,742	25,139	24,700
Cash Dividends Declared Per Share	$ 0.235	$ 0.230	$ 0.470	$ 0.460