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Related Parties - Schedule Of Related Party Transactions (Details) - Affiliated Entity - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Sep. 30, 2018
Purchaser of subsidiary |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | $ 0 | $ 0 | $ 0 | $ 0 |
Accounts Receivable (Payable) | 876 |  | 876 |  | $ 850
Disposed entity |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | 0 | 0 | 0 | 0 |
Accounts Receivable (Payable) | 966 |  | 966 |  | 937
Subcontracting Services |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | (7,195) | (4,321) | (13,561) | (8,687) |
Accounts Receivable (Payable) | (1,724) |  | (1,724) |  | (790)
Construction Services |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | 1,609 | 57 | 2,783 | 1,633 |
Accounts Receivable (Payable) | 4,350 |  | 4,350 |  | 2,863
Deep South Adventures, LLC |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | 0 | 0 | 0 | (33) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
Vehicles |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | (496) | (288) | (1,128) | (864) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
Consulting Services |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | (64) | (87) | (198) | (203) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
Legal Services |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | 0 | 0 | 0 | (58) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
H&K |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | (36) | (21) | (78) | (63) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
H&A |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | 0 | (17) | 0 | (51) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
Island Pond |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | (80) | (80) | (240) | (240) |
Accounts Receivable (Payable) | 0 |  | 0 |  | 0
SunTx |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Revenue Earned (Expense Incurred) | (316) | $ (468) | (957) | $ (1,119) |
Accounts Receivable (Payable) | $ 0 |  | $ 0 |  | $ 0

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- Definition Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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