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Commitments and Contingencies Extended Warranty (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Beginning balance | $ 139,500 |
Ending balance | 114,300 | $ 139,500
Less: current portion of unearned revenue for extended warranty | 64,976 | 73,301
Extended Warranty [Member] |  |
Beginning balance | 33,654 | 34,138
Unearned revenue for new extended warranties | 1,437 | 2,792
Unearned revenue recognized | (3,594) | (2,832)
Effect of change in exchange rates | 52 | (444)
Ending balance | 31,549 | 33,654
Less: current portion of unearned revenue for extended warranty | 4,226 | 3,565
Long-term unearned revenue for extended warranty within Other long-term obligations | $ 27,323 | $ 30,089

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