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Other Comprehensive Income Other Comprehensive Income, Tax (Tables)
 9 Months Ended
Apr. 30, 2017
Apr. 30, 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 nine months ended April 30, 2017:
 
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
)
The changes in accumulated other comprehensive loss by component, net of tax, for the nine months ended April 30, 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) income before reclassification
(368
)
 
(2
)
 
4,634

 
4,264

Amounts reclassified from accumulated other comprehensive loss
(106
)
 
(1,520
)
 
—

 
(1,626
)
Ending balance, April 30, 2016
$
(465
)
 
$
1,916

 
$
(43,847
)
 
$
(42,396
)
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 nine months ended April 30, 2017 and 2016:
 
Three months ended April 30,
 
Nine months ended April 30,
 
2017
 
2016
 
2017
 
2016
Income tax benefit (expense) related to items of other comprehensive income (loss):
 
 
 
 
 
 
 
Net investment hedge translation adjustments
$
752

 
$
1,456

 
$
(1,373
)
 
$
75

Cash flow hedges
90

 
(126
)
 
(46
)
 
428

Pension and other post-retirement benefits
—

 
25

 
—

 
27

Other income tax adjustments and currency translation
(21
)
 
(42
)
 
39

 
(52
)
Income tax benefit (expense) related to items of other comprehensive income (loss)
$
821

 
$
1,313

 
$
(1,380
)
 
$
478