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Other Comprehensive Income Other Comprehensive Income, Tax (Tables)
 6 Months Ended
Jan. 31, 2018
Jan. 31, 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 six months ended January 31, 2018:
 
Unrealized gain (loss) 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
(598
)
 
382

 
9,953

 
9,737

Amounts reclassified from accumulated other comprehensive loss
126

 
(271
)
 
—

 
(145
)
Ending balance, January 31, 2018
$
(363
)
 
$
2,731

 
$
(37,458
)
 
$
(35,090
)
The changes in accumulated other comprehensive loss by component, net of tax, for the six months ended January 31, 2017, were as follows:
 
Unrealized loss 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 (loss) income before reclassification
(80
)
 
72

 
(13,442
)
 
(13,450
)
Amounts reclassified from accumulated other comprehensive loss
253

 
(272
)
 
—

 
(19
)
Ending balance, January 31, 2017
$
(684
)
 
$
2,036

 
$
(69,566
)
 
$
(68,214
)
Other Comprehensive Income , Tax [Table Text Block]
The following table illustrates the income tax benefit (expense) on the components of other comprehensive income (loss) for the three and six months ended January 31, 2018 and 2017:
 
Three months ended January 31,
 
Six months ended January 31,
 
2018
 
2017
 
2018
 
2017
Income tax benefit (expense) related to items of other comprehensive income (loss):
 
 
 
 
 
 
 
Net investment hedge translation adjustments
$
1,029

 
$
(556
)
 
$
694

 
$
(2,125
)
Cash flow hedges
78

 
(8
)
 
(117
)
 
(137
)
Pension and other post-retirement benefits
(209
)
 
—

 
(209
)
 
—

Other income tax adjustments and currency translation
(71
)
 
29

 
(26
)
 
61

Income tax benefit (expense) related to items of other comprehensive income (loss)
$
827

 
$
(535
)
 
$
342

 
$
(2,201
)