Contingencies - Warranty (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2016 |
|
Movement in Standard Product Warranty Accrual [Roll Forward] | |||
Balance at beginning of period | $ 18,091 | $ 39,131 | $ 27,681 |
Accruals for warranties issued | 13,755 | 14,215 | 13,835 |
Changes in liability related to warranties existing in prior periods | (2,401) | 4,807 | 53,109 |
Payments made | (14,114) | (40,062) | (55,494) |
Balance at end of period | $ 15,331 | $ 18,091 | $ 39,131 |