Equity Based Compensation (Status For Options Which Contain Vesting Provisions) (Details)	12 Months Ended
	Jul. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Options Non-vested at July 31, 2015 (in shares) | shares	1,757,140
Granted (in shares) | shares	969,450
Vested (in shares) | shares	(829,409)
Canceled (in shares) | shares	(134,325)
Options Non-vested at July 31, 2016 (in shares) | shares	1,762,856
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted Average Grant Date Fair Value, Outstanding at July 31, 2015 (in dollars per share) | $ / shares	$ 10.36
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	7.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	10.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares	9.64
Weighted Average Grant Date Fair Value, Outstanding at July 31, 2016 (in dollars per share) | $ / shares	$ 8.70