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Other Comprehensive Income Other Comprehensive Income, Tax (Tables)
 6 Months Ended
Jan. 31, 2017
Jan. 31, 2016
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, 2017:
 
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 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
)
The changes in accumulated other comprehensive loss by component, net of tax, for the six months ended January 31, 2016, were as follows:
 
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, 2015
$
9

 
$
3,438

 
$
(48,481
)
 
$
(45,034
)
Other comprehensive loss before reclassification
(141
)
 
—

 
(15,613
)
 
(15,754
)
Amounts reclassified from accumulated other comprehensive loss
(209
)
 
(1,358
)
 
—

 
(1,567
)
Ending balance, January 31, 2016
$
(341
)
 
$
2,080

 
$
(64,094
)
 
$
(62,355
)
Other Comprehensive Income , Tax [Table Text Block]
The following table illustrates the income tax expense on the components of other comprehensive loss for the three and six months ended January 31, 2017 and 2016:
 
Three months ended January 31,
 
Six months ended January 31,
 
2017
 
2016
 
2017
 
2016
Income tax expense related to items of other comprehensive loss:
 
 
 
 
 
 
 
Net investment hedge translation adjustments
$
(556
)
 
$
(1,042
)
 
$
(2,125
)
 
$
(1,381
)
Cash flow hedges
(8
)
 
56

 
(137
)
 
554

Other income tax adjustments and currency translation
29

 
7

 
61

 
(8
)
Income tax expense related to items of other comprehensive loss
$
(535
)
 
$
(979
)
 
$
(2,201
)
 
$
(835
)