Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 21,020	$ 14,036
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	32,636	30,588
Provision for Doubtful Accounts	825	844
Non-Cash Stock-Based Compensation	2,127	2,086
Gain on Sale of Rental Equipment	(6,496)	(4,745)
Change In:
Accounts Receivable	(3,167)	342
Income Taxes Receivable	6,131	5,075
Prepaid Expenses and Other Assets	(8,821)	(1,487)
Accounts Payable and Accrued Liabilities	9,887	2,900
Deferred Income	7,191	(3,967)
Deferred Income Taxes	10,116	(2,519)
Net Cash Provided by Operating Activities	71,449	43,153
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of Rental Equipment	(71,160)	(59,207)
Purchase of Property, Plant and Equipment	(10,828)	(3,554)
Proceeds from Sale of Used Rental Equipment	13,703	10,965
Net Cash Used in Investing Activities	(68,285)	(51,796)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Borrowings (Payments) Under Bank Lines of Credit	(83,140)	28,166
Borrowings Under Private Placement	100,000
Principal Payments on Senior Notes	(12,000)	(12,000)
Proceeds from the Exercise of Stock Options	1,770	2,087
Excess Tax Benefit from Exercise and Disqualifying Disposition of Stock Options	696	352
Payment of Dividends	(11,043)	(10,616)
Net Cash Provided by (Used in) Financing Activities	(3,717)	7,989
Net Decrease in Cash	(553)	(654)
Cash Balance, beginning of period	990	1,187
Cash Balance, end of period	437	533
Interest Paid, during the period	2,658	3,138
Income Taxes Paid (Refunds Received), during the period	(3,598)	6,199
Dividends Declared, not yet paid	5,605	5,414
Rental Equipment Acquisitions, not yet paid	$ 11,812	$ 9,789