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Segment Information (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2017 USD ($) segment state | Mar. 31, 2016 USD ($) | Mar. 31, 2017 USD ($) segment state region | Mar. 31, 2016 USD ($) | Sep. 30, 2016 USD ($)
Segment Reporting [Abstract] |  |  |  |  |
Number of states in which home building segments operate | state | 13 |  | 13 |  |
Number of regions in which entity operates | segment | 3 |  | 3 |  |
Number of homebuilding segments | region |  |  | 3 |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue | $ 425,468 | $ 385,607 | $ 764,709 | $ 730,056 |
Operating income | 7,511 | 3,030 | 8,786 | 12,178 |
Depreciation and amortization | 3,155 | 3,056 | 5,832 | 6,047 |
Write-off of deposit on legacy land investment |  |  | 2,700 | 0 |
Excess insurance recovery |  | 3,600 |  | 3,600 |
Capital Expenditures |  |  | 5,677 | 6,017 |
Total capital expenditures |  |  | 5,677 | 6,017 |
Assets | 2,175,201 |  | 2,175,201 |  | $ 2,213,158
Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 43,885 | 34,998 | 71,472 | 66,588 |
Depreciation and amortization | 2,799 | 2,513 | 5,042 | 4,977 |
Corporate and unallocated |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | (36,374) | (31,968) | (62,686) | (54,410) |
Depreciation and amortization | 356 | 543 | 790 | 1,070 |
Capital Expenditures |  |  | 191 | 216 |
Assets | 689,686 |  | 689,686 |  | 756,238
West Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue | 185,155 | 179,930 | 356,904 | 337,126 |
West Segment | Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 20,779 | 18,927 | 41,794 | 35,713 |
Depreciation and amortization | 1,545 | 1,332 | 2,793 | 2,550 |
Capital Expenditures |  |  | 3,165 | 2,906 |
Assets | 807,218 |  | 807,218 |  | 778,521
East Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue | 116,640 | 106,835 | 200,799 | 207,392 |
East Segment | Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 10,532 | 8,333 | 12,089 | 12,480 |
Depreciation and amortization | 598 | 634 | 1,127 | 1,431 |
Capital Expenditures |  |  | 1,446 | 1,273 |
Assets | 335,172 |  | 335,172 |  | 344,898
Southeast Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue | 123,673 | 98,842 | 207,006 | 185,538 |
Southeast Segment | Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Operating income | 12,574 | 7,738 | 17,589 | 18,395 |
Depreciation and amortization | 656 | $ 547 | 1,122 | 996 |
Capital Expenditures |  |  | 875 | $ 1,622 |
Assets | $ 343,125 |  | $ 343,125 |  | $ 333,501

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