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Fair Value Measurements (Details) CAD in Millions | 6 Months Ended |  |  |
--- | --- | --- | --- | ---
Jan. 31, 2017 USD ($) | Jan. 31, 2016 USD ($) | Jan. 31, 2017 CAD | Jul. 31, 2016 USD ($) | Jul. 31, 2015 USD ($)
Contingent Consideration | $ 11,700,000 | $ 6,900,000 |  | $ 11,100,000 | $ 6,900,000
Derivative, Maturity Date | Sep. 01, 2020 |  |  |  |
Money Market | $ 3,003,000 |  |  |  |
Interest Rate Swap | 1,060,000 |  |  |  |
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability | (600,000) | 0 |  |  |
Level 1 [Member] |  |  |  |  |
Contingent Consideration | 0 | 0 |  | 0 |
Interest Rate Swap | 0 |  |  |  |
Level 2 [Member] |  |  |  |  |
Contingent Consideration | 0 | 0 |  | 0 |
Money Market | 0 |  |  |  |
Interest Rate Swap | 1,060,000 |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Contingent Consideration | 11,700,000 | 6,900,000 |  | 11,100,000 |
Money Market | 0 |  |  |  |
Interest Rate Swap | 0 |  |  |  |
Money Market Funds [Member] | Level 1 [Member] |  |  |  |  |
Commercial Paper | 3,003,000 |  |  |  |
Commercial Paper [Member] |  |  |  |  |
Commercial Paper | 2,401,000 | 2,401,000 |  | 2,401,000 |
Commercial Paper [Member] | Level 2 [Member] |  |  |  |  |
Commercial Paper | 2,401,000 | 2,401,000 |  | 2,401,000 |
Certificates of Deposit [Member] |  |  |  |  |
Commercial Paper | 2,626,000 | 2,401,000 |  | 2,403,000 |
Certificates of Deposit [Member] | Level 2 [Member] |  |  |  |  |
Commercial Paper | 2,626,000 | $ 2,401,000 |  | $ 2,403,000 |
Canada, Dollars |  |  |  |  |
Interest Rate Swap | CAD |  |  | CAD 125.0 |  |
United States of America, Dollars |  |  |  |  |
Interest Rate Swap | $ 95,600,000 |  |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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