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Contingencies - Warranty (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 45 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 USD ($) home | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) home | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) home
Loss Contingencies [Line Items] |  |  |  |  |
Standard product warranty length, minimum |  |  | 1 year |  |
Standard product warranty length, maximum |  |  | 2 years |  |
Limited product warranty length (up to) |  |  | 10 years |  |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |  |
Balance at beginning of period | $ 14,583 | $ 25,386 | $ 18,091 | $ 39,131 |
Accruals for warranties issued | 3,254 | 3,727 | 10,758 | 9,549 |
Changes in liability related to warranties existing in prior periods | 711 | (1,293) | (2,574) | 6,581 |
Payments made | (3,258) | (7,998) | (10,985) | (35,439) |
Balance at end of period | 15,290 | 19,822 | 15,290 | 19,822 | $ 15,290
Insurance recoveries | 200 | $ 600 | 200 | $ 5,600 |
Florida |  |  |  |  |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |  |
Insurance recoveries |  |  | 82,800 |  |
Specific Warranty Issue |  |  |  |  |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |  |
Product warranty expense |  |  |  |  | 85,100
Specific Warranty Issue | Florida |  |  |  |  |
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |  |
Balance at end of period | 2,100 |  | 2,100 |  | $ 2,100
Decrease in warranty reserves | $ 100 |  | $ (500) |  |
Homes likely to require more than minor repairs | home | 708 |  | 708 |  | 708
Homes have been repaired | home | 682 |  | 682 |  | 682
Product warranty accrual, payments | $ 400 |  | $ 2,100 |  |
Estimated remaining warranty costs | $ 2,300 |  | $ 2,300 |  | $ 2,300

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