Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 20,390	$ 21,020
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	35,339	32,636
Provision for Doubtful Accounts	1,301	825
Non-Cash Stock-Based Compensation	2,077	2,127
Gain on Sale of Used Rental Equipment	(5,968)	(6,496)
Change In:
Accounts Receivable	4,968	(3,167)
Income Taxes Receivable		6,131
Prepaid Expenses and Other Assets	(9,489)	(8,821)
Accounts Payable and Accrued Liabilities	3,761	9,887
Deferred Income	3,647	7,191
Deferred Income Taxes	9,247	10,116
Net Cash Provided by Operating Activities	65,273	71,449
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of Rental Equipment	(73,281)	(71,160)
Purchase of Property, Plant and Equipment	(8,883)	(10,828)
Proceeds from Sale of Used Rental Equipment	12,206	13,703
Net Cash Used in Investing Activities	(69,958)	(68,285)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Borrowings (Repayments) Under Bank Lines of Credit	11,500	(83,140)
Borrowings Under Private Placement		100,000
Principal Payments on Senior Notes		(12,000)
Proceeds from the Exercise of Stock Options	3,086	1,770
Excess Tax Benefit from Exercise and Disqualifying Disposition of Stock Options	684	696
Payment of Dividends	(11,474)	(11,043)
Net Cash Provided by (Used in) Financing Activities	3,796	(3,717)
Net Decrease in Cash	(889)	(553)
Cash Balance, beginning of period	1,229	990
Cash Balance, end of period	340	437
Interest Paid, during the period	4,616	2,658
Net Income Taxes Paid (Refunds Received), during the period	3,216	(3,598)
Dividends Accrued During the period, not yet paid	6,057	5,376
Rental Equipment Acquisitions, not yet paid	$ 9,989	$ 11,812