Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
REVENUES
Rental	$ 65,941	$ 63,418	$ 189,585	$ 183,327
Rental Related Services	15,858	13,010	39,364	34,703
Rental Operations	81,799	76,428	228,949	218,030
Sales	26,515	22,382	54,186	42,318
Other	546	620	1,571	1,776
Total Revenues	108,860	99,430	284,706	262,124
Direct Costs of Rental Operations
Depreciation of Rental Equipment	17,233	16,163	50,461	47,236
Rental Related Services	11,278	10,252	29,591	27,816
Other	16,361	12,698	42,202	33,856
Total Direct Costs of Rental Operations	44,872	39,113	122,254	108,908
Costs of Sales	18,778	16,677	38,098	28,961
Total Costs of Revenues	63,650	55,790	160,352	137,869
Gross Profit	45,210	43,640	124,354	124,255
Selling and Administrative Expenses	22,383	20,848	65,813	63,372
Income from Operations	22,827	22,792	58,541	60,883
Interest Expense	2,148	2,312	6,508	6,867
Income Before Provision for Income Taxes	20,679	20,480	52,033	54,016
Provision for Income Taxes	8,106	8,029	20,397	21,175
Net Income	$ 12,573	$ 12,451	$ 31,636	$ 32,841
Earnings Per Share:
Basic	$ 0.49	$ 0.50	$ 1.25	$ 1.33
Diluted	$ 0.48	$ 0.50	$ 1.23	$ 1.31
Shares Used in Per Share Calculation:
Basic	25,649	24,785	25,338	24,730
Diluted	26,095	25,106	25,787	25,133
Cash Dividends Declared Per Share	$ 0.240	$ 0.235	$ 0.720	$ 0.705