Stock-Based Compensation Subsequent Events (Details) - Subsequent Event	3 Months Ended
	Oct. 31, 2016 USD ($) shares
Subsequent Event [Line Items]
Number of stock-based awards authorized for issuance (in shares)	409,329
Total unrecognized stock-based compensation, net of estimated forfeitures and assuming achievement of the pre-established performance goal at a target level, related to stock-based awards authorized for issuance. | $	$ 5,139,000
Performance Shares [Member]
Subsequent Event [Line Items]
Number of stock-based awards authorized for issuance (in shares)	137,613
Restricted Stock [Member]
Subsequent Event [Line Items]
Number of stock-based awards authorized for issuance (in shares)	144,899
Restricted Stock Units (RSUs) [Member]
Subsequent Event [Line Items]
Number of stock-based awards authorized for issuance (in shares)	126,817