Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 9,215	$ 9,911
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	18,808	17,516
Provision for Doubtful Accounts	696	373
Non-Cash Stock-Based Compensation	1,126	994
Gain on Sale of Used Rental Equipment	(3,334)	(3,073)
Change In:
Accounts Receivable	4,534	7,705
Prepaid Expenses and Other Assets	5,528	(4,156)
Accounts Payable and Accrued Liabilities	7,872	(339)
Deferred Income	(6,282)	1,989
Deferred Income Taxes	3,457	4,562
Net Cash Provided by Operating Activities	41,620	35,482
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of Rental Equipment	(25,151)	(35,039)
Purchase of Property, Plant and Equipment	(1,553)	(1,823)
Proceeds from Sale of Used Rental Equipment	6,805	6,776
Net Cash Used in Investing Activities	(19,899)	(30,086)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Repayments Under Bank Lines of Credit	(20,749)	(4,382)
Proceeds from the Exercise of Stock Options	3,222	3,147
Excess Tax Benefit from Exercise and Disqualifying Disposition of Stock Options	715	630
Payment of Dividends	(6,060)	(5,655)
Net Cash Used in Financing Activities	(22,872)	(6,260)
Net Decrease in Cash	(1,151)	(864)
Cash Balance, beginning of period	1,612	1,229
Cash Balance, end of period	461	365
Interest Paid, during the period	1,276	1,071
Net Income Taxes Paid, during the period	1,519	1,199
Dividends Accrued During the period, not yet paid	6,133	6,268
Rental Equipment Acquisitions, not yet paid	$ 6,660	$ 12,682