CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands		3 Months Ended
		Oct. 31, 2015	Oct. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income		$ 7,779	$ 7,694
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	[1]	(2,631)	(12,196)
Change in pension liabilities, net of tax
Less: amortization of prior (gain) loss included in net periodic pension cost	[2]	19	(6)
Other comprehensive income (loss), net of tax	[2]	(2,612)	(12,202)
Comprehensive income (loss)		$ 5,167	$ (4,508)

[1] Net of tax benefit of $0.1 million and $0.7 million for the three months ended October 31, 2015 and October 31, 2014, respectively.

[2] Net of tax effect of nil for the three months ended October 31, 2015 and October 31, 2014.