Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 19,063	$ 20,390
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	37,645	35,339
Provision for Doubtful Accounts	911	1,301
Non-Cash Stock-Based Compensation	2,255	2,077
Gain on Sale of Used Rental Equipment	(6,256)	(5,968)
Change In:
Accounts Receivable	4,059	4,968
Prepaid Expenses and Other Assets	(168)	(9,489)
Accounts Payable and Accrued Liabilities	6,148	3,761
Deferred Income	(988)	3,647
Deferred Income Taxes	3,570	9,247
Net Cash Provided by Operating Activities	66,239	65,273
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of Rental Equipment	(56,241)	(73,281)
Purchase of Property, Plant and Equipment	(4,156)	(8,883)
Proceeds from Sale of Used Rental Equipment	14,373	12,206
Net Cash Used in Investing Activities	(46,024)	(69,958)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net Borrowings (Repayments) Under Bank Lines of Credit	(23,125)	11,500
Proceeds from the Exercise of Stock Options	12,716	3,086
Excess Tax Benefit from Exercise and Disqualifying Disposition of Stock Options	1,398	684
Payment of Dividends	(12,109)	(11,474)
Net Cash Provided by (Used in) Financing Activities	(21,120)	3,796
Net Decrease in Cash	(905)	(889)
Cash Balance, beginning of period	1,612	1,229
Cash Balance, end of period	707	340
Interest Paid, during the period	4,331	4,616
Net Income Taxes Paid, during the period	6,779	3,216
Dividends Accrued, during the period, not yet paid	6,327	6,057
Rental Equipment Acquisitions, not yet paid	$ 3,887	$ 9,989