Investment in Other Affiliates	12 Months Ended
Dec. 31, 2018
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]
Investment in Other Affiliates	Investment in Other Affiliates The Company has certain investments in nonmarketable securities of strategic companies. The Company had $6,133,000 and $19,435,000 of such investments as of December 31, 2018 and 2017, respectively, and are recorded as a component of other long-term assets in the accompanying consolidated balance sheets. As of December 31, 2017, the Company’s investment in Eicher-Polaris Private Limited (EPPL) represented the majority of these investments. EPPL is a joint venture established in 2012 with Eicher Motors Limited (“Eicher”). Polaris and Eicher each control 50 percent of the joint venture, which is intended to design, develop and manufacture a full range of new vehicles for India and other emerging markets. The investment in EPPL is accounted for under the equity method, with Polaris’ proportionate share of income or loss recorded within the consolidated financial statements on a one month lag due to financial information not being available timely. 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 fully impaired its investment in EPPL by recognizing an impairment charge of $18,733,000 within Equity in loss of other affiliates in the consolidated statement of income. The Company has recognized $27,048,000 of costs, including impairment, associated with the wind-down of EPPL for the year ended December 31, 2018. As of December 31, 2018 and 2017, the carrying value of the Company’s investment in EPPL was $0 and $18,616,000, respectively. 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. As a result of the Victory^® Motorcycles wind down, the Company recognized an impairment of substantially all of its cost-method investment in Brammo, Inc. in the first quarter of 2017. The impairment was recorded within other expense, net in the consolidated statements of income, and reduced the Brammo investment. See Note 15 for additional discussion related to charges incurred related to the Victory Motorcycles wind down. In October 2017, an agreement was signed to sell the assets of Brammo, Inc. to a third party. The sale was completed in the fourth quarter of 2017, and as a result of the sale, Polaris recorded a gain, which is included in Other expense (income), net on the 2017 consolidated statements of income. 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 expense (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 $6,133,000 and $19,435,000 of such investments as of December 31, 2018 and 2017, respectively, and are recorded as a component of other long-term assets in the accompanying consolidated balance sheets. As of December 31, 2017, the Company’s investment in Eicher-Polaris Private Limited (EPPL) represented the majority of these investments.

EPPL is a joint venture established in 2012 with Eicher Motors Limited (“Eicher”). Polaris and Eicher each control 50 percent of the joint venture, which is intended to design, develop and manufacture a full range of new vehicles for India and other emerging markets. The investment in EPPL is accounted for under the equity method, with Polaris’ proportionate share of income or loss recorded within the consolidated financial statements on a one month lag due to financial information not being available timely.

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 fully impaired its investment in EPPL by recognizing an impairment charge of $18,733,000 within Equity in loss of other affiliates in the consolidated statement of income. The Company has recognized $27,048,000 of costs, including impairment, associated with the wind-down of EPPL for the year ended December 31, 2018. As of December 31, 2018 and 2017, the carrying value of the Company’s investment in EPPL was $0 and $18,616,000, respectively.

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. As a result of the Victory^® Motorcycles wind down, the Company recognized an impairment of substantially all of its cost-method investment in Brammo, Inc. in the first quarter of 2017. The impairment was recorded within other expense, net in the consolidated statements of income, and reduced the Brammo investment. See Note 15 for additional discussion related to charges incurred related to the Victory Motorcycles wind down.

In October 2017, an agreement was signed to sell the assets of Brammo, Inc. to a third party. The sale was completed in the fourth quarter of 2017, and as a result of the sale, Polaris recorded a gain, which is included in Other expense (income), net on the 2017 consolidated statements of income. 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 expense (income) on the consolidated statements of income.