Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues
Rental	$ 82,696	$ 74,261
Rental related services	21,455	17,831
Rental operations	104,151	92,092
Revenues	17,857	12,993
Total revenues	122,008	105,085
Direct costs of rental operations:
Depreciation of rental equipment	18,961	17,777
Rental related services	16,363	13,768
Other	19,733	16,269
Total direct costs of rental operations	55,057	47,814
Costs of sales	9,946	7,101
Total costs of revenues	65,003	54,915
Gross profit	57,005	50,170
Selling and administrative expenses	29,695	28,128
Income from operations	27,310	22,042
Other income (expense):
Interest expense	(3,108)	(2,992)
Foreign currency exchange gain (loss)	49	(32)
Income before provision for income taxes	24,251	19,018
Provision for income taxes	5,802	4,552
Net income	$ 18,449	$ 14,466
Earnings per share:
Basic	$ 0.76	$ 0.60
Diluted	$ 0.75	$ 0.59
Shares used in per share calculation:
Basic	24,195	24,067
Diluted	24,540	24,478
Cash dividends declared per share	$ 0.375	$ 0.340
Sales [Member]
Revenues
Revenues	$ 16,825	$ 12,091
Other [Member]
Revenues
Revenues	$ 1,032	$ 902