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Revenue Recognition - Capitalized Contract Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2020 | Jul. 31, 2019 | Jan. 31, 2019
Changes in Capitalized Contract Cost [Roll Forward] |  |  |  |  |  |  |
Beginning balance | $ 70,426 | $ 55,978 | $ 69,785 | $ 55,910 |  |  |
Capitalization of contract acquisition costs | 9,514 | 9,080 | 15,690 | 13,472 |  |  |
Amortization of deferred contract acquisition costs | (5,890) | (4,457) | (11,425) | (8,781) |  |  |
Ending balance | 74,050 | 60,601 | 74,050 | 60,601 |  |  |
Deferred contract acquisition costs, current |  |  |  |  | $ 23,527 | $ 21,219 | $ 18,058
Deferred contract acquisition costs, noncurrent |  |  |  |  | 50,523 | 48,566 | 42,543
Total deferred contract acquisition costs | $ 74,050 | $ 60,601 | $ 74,050 | $ 60,601 | $ 74,050 | $ 69,785 | $ 60,601

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer; classified as current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer; classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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