Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Rental	$ 69,953	$ 66,747	$ 137,931	$ 133,279
Rental related services	18,796	19,315	36,731	36,906
Rental operations	88,749	86,062	174,662	170,185
Sales	20,187	16,396	28,482	25,430
Other	646	647	1,275	1,189
Total revenues	109,582	103,105	204,419	196,804
Direct costs of rental operations:
Depreciation of rental equipment	17,242	18,231	34,621	36,771
Rental related services	14,312	14,677	28,145	28,402
Other	16,039	16,020	31,398	31,302
Total direct costs of rental operations	47,593	48,928	94,164	96,475
Costs of sales	12,778	10,421	17,374	15,918
Total costs of revenues	60,371	59,349	111,538	112,393
Gross profit	49,211	43,756	92,881	84,411
Selling and administrative expenses	27,365	25,683	55,213	52,080
Income from operations	21,846	18,073	37,668	32,331
Other income (expense):
Interest expense	(2,949)	(2,990)	(5,738)	(6,546)
Foreign currency exchange gain (loss)	11	(77)	237	74
Income before provision for income taxes	18,908	15,006	32,167	25,859
Provision for income taxes	7,447	5,927	12,733	10,214
Net income	$ 11,461	$ 9,079	$ 19,434	$ 15,645
Earnings per share:
Basic	$ 0.48	$ 0.38	$ 0.81	$ 0.66
Diluted	$ 0.48	$ 0.38	$ 0.80	$ 0.65
Shares used in per share calculation:
Basic	23,985	23,900	23,968	23,881
Diluted	24,092	23,949	24,164	23,931
Cash dividends declared per share	$ 0.260	$ 0.255	$ 0.520	$ 0.510