Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Rental	$ 118,361	$ 103,269	$ 333,226	$ 283,937
Rental related services	35,361	31,513	88,497	73,870
Rental operations	153,722	134,782	421,723	357,807
Revenues			101,217	83,115
Total revenues	200,536	173,292	522,940	440,922
Direct costs of rental operations:
Depreciation of rental equipment	24,176	23,802	72,114	68,216
Rental related services	25,971	24,356	64,967	56,236
Other	31,708	24,711	92,356	67,696
Total direct costs of rental operations	81,855	72,869	229,437	192,148
Costs of sales	29,241	24,618	59,737	50,021
Total costs of revenues	111,096	97,487	289,174	242,169
Gross profit	89,440	75,805	233,766	198,753
Selling and administrative expenses	44,095	39,907	124,010	109,305
Income from operations	45,345	35,898	109,756	89,448
Other expense:
Interest expense	(4,177)	(3,168)	(9,998)	(7,208)
Foreign currency exchange loss	(236)	(128)	(404)	(185)
Income before provision for income taxes	40,932	32,602	99,354	82,055
Provision for income taxes	10,365	9,350	23,857	20,797
Net income	$ 30,567	$ 23,252	$ 75,497	$ 61,258
Earnings per share:
Basic	$ 1.25	$ 0.96	$ 3.10	$ 2.53
Diluted	$ 1.25	$ 0.95	$ 3.08	$ 2.50
Shares used in per share calculation:
Basic	24,379	24,245	24,342	24,209
Diluted	24,504	24,507	24,516	24,506
Cash dividends declared per share	$ 0.455	$ 0.435	$ 1.365	$ 1.305
Sales [Member]
Revenues
Revenues	$ 45,391	$ 37,636	$ 97,738	$ 80,503
Other [Member]
Revenues
Revenues	$ 1,423	$ 874	$ 3,479	$ 2,612