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Other Comprehensive Income Other Comprehensive Income, Tax (Tables)
 9 Months Ended
Apr. 30, 2018
Apr. 30, 2017
Other Comprehensive Income (Loss), Tax [Abstract]    
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
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, 2018:
 
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
)
The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended April 30, 2017, were as follows:
 
Unrealized (loss) gain on cash flow hedges
 
Unamortized gain on post-retirement plans
 
Foreign currency translation adjustments
 
Accumulated other comprehensive loss
Beginning balance, July 31, 2016
$
(857
)
 
$
2,236

 
$
(56,124
)
 
$
(54,745
)
Other comprehensive income (loss) before reclassification
563

 
72

 
(9,144
)
 
(8,509
)
Amounts reclassified from accumulated other comprehensive loss
323

 
(408
)
 
—

 
(85
)
Ending balance, April 30, 2017
$
29

 
$
1,900

 
$
(65,268
)
 
$
(63,339
)
Other Comprehensive Income , Tax [Table Text Block]
The following table illustrates the income tax (expense) benefit on the components of other comprehensive (loss) income for the three and nine months ended April 30, 2018 and 2017:
 
Three months ended April 30,
 
Nine months ended April 30,
 
2018
 
2017
 
2018
 
2017
Income tax (expense) benefit related to items of other comprehensive loss (income):
 
 
 
 
 
 
 
Net investment hedge translation adjustments
$
(306
)
 
$
752

 
$
388

 
$
(1,373
)
Cash flow hedges
(262
)
 
90

 
(379
)
 
(46
)
Pension and other post-retirement benefits
—

 
—

 
(178
)
 
—

Other income tax adjustments and currency translation
(412
)
 
(21
)
 
(469
)
 
39

Income tax (expense) benefit related to items of other comprehensive (loss) income
$
(980
)
 
$
821

 
$
(638
)
 
$
(1,380
)