Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues
Rental	$ 110,624	$ 94,581	$ 214,865	$ 180,668
Rental related services	28,819	22,688	53,136	42,357
Rental operations	139,443	117,269	268,001	223,025
Revenues			54,403	44,605
Total revenues	177,031	146,435	322,404	267,630
Direct costs of rental operations:
Depreciation of rental equipment	24,064	23,159	47,938	44,414
Rental related services	20,853	17,276	38,996	31,880
Other	32,825	23,278	60,648	42,985
Total direct costs of rental operations	77,742	63,713	147,582	119,279
Costs of sales	21,452	16,855	30,496	25,403
Total costs of revenues	99,194	80,568	178,078	144,682
Gross profit	77,837	65,867	144,326	122,948
Selling and administrative expenses	40,788	36,261	79,915	69,398
Income from operations	37,049	29,606	64,411	53,550
Other expense:
Interest expense	(3,001)	(2,257)	(5,821)	(4,040)
Foreign currency exchange loss	(181)	(2)	(168)	(57)
Income before provision for income taxes	33,867	27,347	58,422	49,453
Provision for income taxes	7,730	6,739	13,492	11,447
Net income	$ 26,137	$ 20,608	$ 44,930	$ 38,006
Earnings per share:
Basic	$ 1.07	$ 0.85	$ 1.85	$ 1.57
Diluted	$ 1.07	$ 0.84	$ 1.83	$ 1.55
Shares used in per share calculation:
Basic	24,360	24,229	24,323	24,191
Diluted	24,509	24,494	24,522	24,505
Cash dividends declared per share	$ 0.455	$ 0.435	$ 0.910	$ 0.870
Sales [Member]
Revenues
Revenues	$ 36,471	$ 28,256	$ 52,347	$ 42,867
Other [Member]
Revenues
Revenues	$ 1,117	$ 910	$ 2,056	$ 1,738