Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Rental	$ 103,269	$ 88,138	$ 283,937	$ 263,273
Rental related services	31,513	25,040	73,870	70,026
Rental operations	134,782	113,178	357,807	333,299
Revenues			83,115	90,275
Total revenues	173,292	156,448	440,922	423,574
Direct costs of rental operations:
Depreciation of rental equipment	23,802	21,419	68,216	64,640
Rental related services	24,356	18,603	56,236	51,760
Other	24,711	18,553	67,696	56,171
Total direct costs of rental operations	72,869	58,575	192,148	172,571
Costs of sales	24,618	29,669	50,021	57,911
Total costs of revenues	97,487	88,244	242,169	230,482
Gross profit	75,805	68,204	198,753	193,093
Selling and administrative expenses	39,907	30,871	109,305	93,365
Income from operations	35,898	37,333	89,448	99,728
Other income (expense):
Interest expense	(3,168)	(1,968)	(7,208)	(6,804)
Foreign currency exchange (loss) gain	(128)	130	(185)	(189)
Income before provision for income taxes	32,602	35,495	82,055	92,735
Provision for income taxes	9,350	7,394	20,797	21,926
Net income	$ 23,252	$ 28,101	$ 61,258	$ 70,809
Earnings per share:
Basic	$ 0.96	$ 1.17	$ 2.53	$ 2.93
Diluted	$ 0.95	$ 1.15	$ 2.50	$ 2.88
Shares used in per share calculation:
Basic	24,245	24,097	24,209	24,170
Diluted	24,507	24,443	24,506	24,558
Cash dividends declared per share	$ 0.435	$ 0.420	$ 1.305	$ 1.260
Sales [Member]
Revenues
Revenues	$ 37,636	$ 42,331	$ 80,503	$ 87,366
Other [Member]
Revenues
Revenues	$ 874	$ 939	$ 2,612	$ 2,909