Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues
Rental	$ 248,444	$ 234,906	$ 200,615
Rental Related Services	46,920	39,486	34,702
Rental Operations	295,364	274,392	235,317
Sales	66,444	66,382	54,055
Other	2,266	1,896	2,028
Total Revenues	364,074	342,670	291,400
Direct Costs of Rental Operations
Depreciation of Rental Equipment	63,819	60,187	56,399
Rental Related Services	37,207	30,692	26,542
Other	45,581	39,859	40,007
Total Direct Costs of Rental Operations	146,607	130,738	122,948
Cost of Sales	49,173	45,141	37,637
Total Costs of Revenues	195,780	175,879	160,585
Gross Profit	168,294	166,791	130,815
Selling and Administrative Expenses	86,278	78,127	65,579
Income from Operations	82,016	88,664	65,236
Interest Expense	9,149	7,606	6,186
Income before Provision for Income Taxes	72,867	81,058	59,050
Provision for Income Taxes	28,090	31,456	22,571
Net Income	$ 44,777	$ 49,602	$ 36,479
Earnings Per Share:
Basic	$ 1.80	$ 2.04	$ 1.52
Diluted	$ 1.78	$ 2.00	$ 1.50
Shares Used in Per Share Calculations:
Basic	24,759	24,349	23,944
Diluted	25,156	24,760	24,289
Dividends Declared Per Share	$ 0.94	$ 0.92	$ 0.90