Goodwill and Other Intangible Assets Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 429,871	$ 433,199
Goodwill, Foreign Currency Translation Gain (Loss)	7,826	3,328
Goodwill, Ending Balance	437,697	429,871
Goodwill, Period Increase (Decrease)	7,826
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Goodwill, Impaired, Accumulated Impairment Loss		328,029
Goodwill, Impaired [Abstract]
Goodwill, Transfers	0
Identification Solutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	384,529	382,786
Goodwill, Foreign Currency Translation Gain (Loss)	4,845	(1,743)
Goodwill, Ending Balance	391,864	384,529
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Goodwill, Impaired, Accumulated Impairment Loss		118,637
Workplace Safety
Goodwill [Roll Forward]
Goodwill, Beginning Balance	45,342	50,413
Goodwill, Foreign Currency Translation Gain (Loss)	2,981	5,071
Goodwill, Ending Balance	45,833	45,342
Goodwill, Impaired, Accumulated Impairment Loss [Abstract]
Goodwill, Impaired, Accumulated Impairment Loss		$ 209,392
Goodwill, Impaired [Abstract]
Goodwill, Transfers	(2,490)
Id Solutions [Member]
Goodwill, Impaired [Abstract]
Goodwill, Transfers	$ 2,490