CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Net sales
Product sales	$ 123,070	$ 106,519	$ 361,219	$ 317,644
Product service	18,438	13,539	52,530	39,728
Total net sales	141,508	120,058	413,749	357,372
Cost of sales
Product sales	64,664	57,808	191,833	172,618
Product service	13,245	9,832	37,212	28,502
Total cost of sales	77,909	67,640	229,045	201,120
Gross profit	63,599	52,418	184,704	156,252
Expenses:
Selling	20,326	16,532	58,994	48,373
General and administrative	18,456	16,428	56,785	47,149
Research and development	3,536	2,632	10,296	7,383
Total operating expenses	42,318	35,592	126,075	102,905
Income from operations	21,281	16,826	58,629	53,347
Interest expense	636	552	1,847	1,854
Interest income	(17)	(17)	(48)	(45)
Loss on sale of business	2,206		2,206
Income before income taxes	18,456	16,291	54,624	51,538
Income taxes	6,100	6,042	19,944	18,978
Net income	$ 12,356	$ 10,249	$ 34,680	$ 32,560
Earnings per common share:
Basic (in dollars per share)	$ 0.30	$ 0.25	$ 0.84	$ 0.79
Diluted (in dollars per share)	$ 0.30	$ 0.25	$ 0.83	$ 0.79
Dividends per common share (in dollars per share)			$ 0.05	$ 0.05