Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows from Operating Activities:
Net Income	$ 43,397	$ 44,777	$ 49,602
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	76,849	72,476	67,395
Provision for Doubtful Accounts	2,144	4,263	1,755
Non-Cash Share-Based Compensation	3,680	3,840	5,221
Gain on Sale of Used Rental Equipment	(13,091)	(12,389)	(12,444)
Change In:
Accounts Receivable	2,462	(3,848)	(17,938)
Income Taxes Receivable			6,131
Prepaid Expenses and Other Assets	(211)	(2,337)	(3,226)
Accounts Payable and Accrued Liabilities	6,695	(3,456)	5,715
Deferred Income	(2,921)	1,857	1,277
Deferred Income Taxes	14,639	21,198	25,823
Net Cash Provided by Operating Activities	133,643	126,381	129,311
Cash Flows from Investing Activities:
Purchases of Rental Equipment	(132,611)	(131,805)	(154,963)
Purchases of Property, Plant and Equipment	(11,973)	(14,161)	(17,204)
Proceeds from Sale of Used Rental Equipment	33,380	30,970	28,453
Net Cash Used in Investing Activities	(111,204)	(114,996)	(143,714)
Cash Flows from Financing Activities:
Net Borrowings (Repayments) Under Bank Lines of Credit	(11,997)	5,500	(57,140)
Borrowings Under Private Placement			100,000
Principal Payments on Senior Notes			(12,000)
Proceeds from the Exercise of Stock Options	15,067	5,841	5,261
Excess Tax Benefit from Exercise and Disqualifying Disposition of Stock Options	1,329	1,033	980
Payment of Dividends	(24,423)	(23,126)	(22,252)
Taxes Paid Related to Net Share Settlement of Stock Awards	(2,395)	(250)	(207)
Net Cash Provided by (Used in) Financing Activities	(22,419)	(11,002)	14,642
Effect of Exchange Rate Changes on Cash	(2)
Net Increase in Cash	18	383	239
Cash Balance, beginning of period	1,612	1,229	990
Cash Balance, end of period	1,630	1,612	1,229
Interest Paid, during the period	8,813	9,107	6,877
Net Income Taxes Paid (Refunds Received), during the period	11,074	5,842	(1,480)
Dividends Accrued During the period, not yet paid	6,373	6,194	5,952
Rental Equipment Acquisitions, not yet paid	$ 8,533	$ 4,491	$ 8,186