Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Rental	$ 82,155	$ 73,781	$ 233,683	$ 211,712
Rental related services	23,880	21,856	60,797	58,587
Rental operations	106,035	95,637	294,480	270,299
Revenues			70,735	69,508
Total revenues	143,147	135,388	365,215	339,807
Direct costs of rental operations:
Depreciation of rental equipment	18,407	17,492	54,287	52,113
Rental related services	18,618	16,611	47,404	44,756
Other	17,674	15,396	52,696	46,794
Total direct costs of rental operations	54,699	49,499	154,387	143,663
Costs of sales	24,398	27,114	42,680	44,488
Total costs of revenues	79,097	76,613	197,067	188,151
Gross profit	64,050	58,775	168,148	151,656
Selling and administrative expenses	28,226	28,489	85,833	83,702
Income from operations	35,824	30,286	82,315	67,954
Other income (expense):
Interest expense	(3,142)	(2,986)	(9,133)	(8,724)
Foreign currency exchange gain (loss)	(129)	36	(505)	273
Income before provision for income taxes	32,553	27,336	72,677	59,503
Provision for income taxes	7,774	10,574	17,520	23,307
Net income	$ 24,779	$ 16,762	$ 55,157	$ 36,196
Earnings per share:
Basic	$ 1.03	$ 0.70	$ 2.29	$ 1.51
Diluted	$ 1.01	$ 0.69	$ 2.25	$ 1.50
Shares used in per share calculation:
Basic	24,172	24,015	24,128	23,984
Diluted	24,563	24,228	24,550	24,201
Cash dividends declared per share	$ 0.340	$ 0.260	$ 1.020	$ 0.780
Sales [Member]
Revenues
Revenues	$ 36,085	$ 38,684	$ 67,722	$ 67,166
Other [Member]
Revenues
Revenues	$ 1,027	$ 1,067	$ 3,013	$ 2,342