Investment in Other Affiliates	3 Months Ended
Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Investment in Other Affiliates	Investment in Other Affiliates The Company has certain investments in nonmarketable securities of strategic companies. The Company had $5,527,000 and $6,133,000 of such investments as of March 31, 2019, and December 31, 2018, respectively, and are recorded as a component of other long-term assets in the accompanying consolidated balance sheets. During 2018, the Company had an investment in Eicher-Polaris Private Limited (EPPL), a joint venture established in 2012 with Eicher Motors Limited (“Eicher”) intended to design, develop and manufacture a full range of new vehicles for India and other emerging markets. However, during the first quarter of 2018, the Board of Directors of EPPL approved a shut down of the operations of the EPPL joint venture. As a result of the expected closure, the Company recognized $19,630,000 of costs, including impairment, associated with the wind-down of EPPL for the three months ended March 31, 2018. The investment was fully impaired as of March 31, 2019 and December 31, 2018. Polaris will impair or write off an investment and recognize a loss if and when events or circumstances indicate there is impairment in the investment that is other-than-temporary. When necessary, Polaris evaluates investments in nonmarketable securities for impairment, utilizing Level 3 fair value inputs. In October 2017, an agreement was signed to sell the assets of Brammo, Inc. to a third party. During the first quarter of 2018, Polaris received additional distributions from Brammo and recognized a gain of $13,478,000, which is included in Other income on the consolidated statements of income.

Investment in Other Affiliates

The Company has certain investments in nonmarketable securities of strategic companies. The Company had $5,527,000 and $6,133,000 of such investments as of March 31, 2019, and December 31, 2018, respectively, and are recorded as a component of other long-term assets in the accompanying consolidated balance sheets.

During 2018, the Company had an investment in Eicher-Polaris Private Limited (EPPL), a joint venture established in 2012 with Eicher Motors Limited (“Eicher”) intended to design, develop and manufacture a full range of new vehicles for India and other emerging markets. However, during the first quarter of 2018, the Board of Directors of EPPL approved a shut down of the operations of the EPPL joint venture. As a result of the expected closure, the Company recognized $19,630,000 of costs, including impairment, associated with the wind-down of EPPL for the three months ended March 31, 2018. The investment was fully impaired as of March 31, 2019 and December 31, 2018.

Polaris will impair or write off an investment and recognize a loss if and when events or circumstances indicate there is impairment in the investment that is other-than-temporary. When necessary, Polaris evaluates investments in nonmarketable securities for impairment, utilizing Level 3 fair value inputs.

In October 2017, an agreement was signed to sell the assets of Brammo, Inc. to a third party. During the first quarter of 2018, Polaris received additional distributions from Brammo and recognized a gain of $13,478,000, which is included in Other income on the consolidated statements of income.