Segment Information - Schedule of Segment Reporting Information By Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Segment Reporting Information [Line Items]
Sales to External Customers	$ 275,927	$ 286,816	$ 824,104	$ 838,519
Segment Profit	37,753	37,910	112,291	102,075
Id Solutions [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	196,880	201,482	589,106	592,282
Segment Profit	32,633	31,898	94,676	80,385
Workplace Safety [Member]
Segment Reporting Information [Line Items]
Sales to External Customers	79,047	85,334	234,998	246,237
Segment Profit	$ 5,120	$ 6,012	$ 17,615	$ 21,690