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Accumulated Other Comprehensive Loss Other Comprehensive Income, Net of Tax (Tables)
 9 Months Ended
Apr. 30, 2019
Apr. 30, 2018
Other Comprehensive Income (Loss), Tax [Abstract]    
Schedule of Accumulated Other Comprehensive Income (Loss)
The following table illustrates the changes in the balances of each component of accumulated other comprehensive loss, net of tax, for the nine months ended April 30, 2019:
 
Unrealized gain on cash flow hedges
 
Unamortized gain on post-retirement plans
 
Foreign currency translation adjustments
 
Accumulated other comprehensive loss
Beginning balance, July 31, 2018
$
863

 
$
3,302

 
$
(60,566
)
 
$
(56,401
)
Other comprehensive income (loss) before reclassification
233

 
(169
)
 
(11,252
)
 
(11,188
)
Amounts reclassified from accumulated other comprehensive loss
(434
)
 
(423
)
 
—

 
(857
)
Ending balance, April 30, 2019
$
662

 
$
2,710

 
$
(71,818
)
 
$
(68,446
)
The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended April 30, 2018, were as follows:
 
Unrealized gain on cash flow hedges
 
Unamortized gain on post-retirement plans
 
Foreign currency translation adjustments
 
Accumulated other comprehensive loss
Beginning balance, July 31, 2017
$
109

 
$
2,620

 
$
(47,411
)
 
$
(44,682
)
Other comprehensive (loss) income before reclassification
(124
)
 
414

 
(3,630
)
 
(3,340
)
Amounts reclassified from accumulated other comprehensive loss
310

 
(434
)
 
—

 
(124
)
Ending balance, April 30, 2018
$
295

 
$
2,600

 
$
(51,041
)
 
$
(48,146
)
Other Comprehensive Income, Tax
The following table illustrates the income tax expense on the components of other comprehensive loss for the three and nine months ended April 30, 2019 and 2018:
 
Three months ended April 30,
 
Nine months ended April 30,
 
2019
 
2018
 
2019
 
2018
Income tax expense related to items of other comprehensive loss:
 
 
 
 
 
 
 
Cash flow hedges
$
38

 
$
(262
)
 
$
—

 
$
(379
)
Pension and other post-retirement benefits
—

 
—

 
—

 
(178
)
Other income tax adjustments and currency translation
(386
)
 
(718
)
 
(610
)
 
(81
)
Income tax expense related to items of other comprehensive loss
$
(348
)
 
$
(980
)
 
$
(610
)
 
$
(638
)