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Other Comprehensive Income Other Comprehensive Income (Tables)
 12 Months Ended
Jul. 31, 2017
Statement of Comprehensive Income [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 income (loss), net of tax, for the periods presented:
 
Unrealized gain (loss) on cash flow hedges
 
Gain on postretirement plans
 
Foreign currency translation adjustments
 
Accumulated other comprehensive loss
Ending balance, July 31, 2015
$
9

 
$
3,438

 
$
(48,481
)
 
$
(45,034
)
Other comprehensive (loss) income before reclassification
(986
)
 
445

 
(7,643
)
 
(8,184
)
Amounts reclassified from accumulated other comprehensive loss
120

 
(1,647
)
 
—

 
(1,527
)
Ending balance, July 31, 2016
$
(857
)
 
$
2,236

 
$
(56,124
)
 
$
(54,745
)
Other comprehensive income before reclassification
670

 
867

 
8,713

 
10,250

Amounts reclassified from accumulated other comprehensive loss
296

 
(483
)
 
—

 
(187
)
Ending balance, July 31, 2017
$
109

 
$
2,620

 
$
(47,411
)
 
$
(44,682
)
Other Comprehensive Income, Tax [Table Text Block]
The following table illustrates the income tax benefit (expense) on the components of other comprehensive income (loss):
 
 
2017
 
2016
 
2015
Income tax benefit (expense) related to items of other comprehensive income (loss):
 
 
 
 
 
 
Net investment hedge translation adjustments
 
$
1,170

 
$
(1,804
)
 
$
(8,450
)
Cash flow hedges
 
705

 
192

 
(308
)
Pension and other post-retirement benefits
 
(4
)
 
738

 
949

Other income tax adjustments
 
550

 
(2,154
)
 
(415
)
Income tax benefit (expense) related to items of other comprehensive income (loss)
 
$
2,421

 
$
(3,028
)
 
$
(8,224
)