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Product Warranties (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2016
Movement in Standard Product Warranty Accrual [Roll Forward] |  |  |  |  |
Beginning balance | $ 17,999 | $ 14,725 | $ 17,217 | $ 10,050 |
Add: Warranty expense | 3,107 | 1,717 | 6,023 | 4,725 |
Additions for acquisitions | 1,872 | 0 | 1,872 | 4,404 |
Less: Warranty claims paid | (2,035) | (925) | (4,169) | (3,662) |
Ending balance | $ 20,943 | $ 15,517 | $ 20,943 | $ 15,517 |
Malibu and Axis Brand Boats |  |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |  |
Standard product warranty, period (up to) |  |  | 1 year |  | 5 years
Malibu Brand Boats |  |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |  |
Standard product warranty, period (up to) |  |  |  |  | 3 years
Axis Boats |  |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |  |
Standard product warranty, period (up to) |  |  |  |  | 2 years
Cobalt |  |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |  |
Standard product warranty, period (up to) |  |  | 3 years |  |
Structural warranty, period (up to) |  |  | 10 years |  |
Pursuit |  |  |  |  |
Product Warranty Liability [Line Items] |  |  |  |  |
Bow-to-stern warranty on all components |  |  | 5 years |  |

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