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Accounts Receivable | 6 Months Ended
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Jan. 27, 2018
Receivables [Abstract] |
Accounts Receivable | Accounts Receivable Accounts receivable consisted of the following (dollars in thousands):
| January 27, 2018 |  | July 29, 2017 |  | July 30, 2016
Contract billings | $ | 300,271 |  |  | $ | 348,990 |  |  | $ | 297,532 |
Retainage | 19,411 |  |  | 21,645 |  |  | 32,101 |
Total | 319,682 |  |  | 370,635 |  |  | 329,633 |
Less: allowance for doubtful accounts | (998 | ) |  | (835 | ) |  | (1,603 | )
Accounts receivable, net | $ | 318,684 |  |  | $ | 369,800 |  |  | $ | 328,030 |
The Company grants credit under normal payment terms, generally without collateral, to its customers. The Company expects to collect the outstanding balance of accounts receivable, net (including retainage) within the next twelve months. The Company maintains an allowance for doubtful accounts for estimated losses on uncollected balances. During the 2018 transition period, fiscal 2017, and fiscal 2016, write-offs to the allowance for doubtful accounts, net of recoveries, were not material. There were no material accounts receivable amounts representing claims or other similar items subject to uncertainty as of January 27, 2018, July 29, 2017, or July 30, 2016. The Company maintains an allowance for doubtful accounts for estimated losses on uncollected balances.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5066-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(6)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5162-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5074-111524 + Details
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