Investments	12 Months Ended
Dec. 31, 2017
Investments, All Other Investments [Abstract]
Investments	Note 7. Investments Investment in Topgolf International, Inc. The Company owns a minority interest in Topgolf International, Inc., doing business as the Topgolf Entertainment Group (“Topgolf”), the owner and operator of Topgolf entertainment centers, which ownership consists of common stock and various classes of preferred stock. In connection with this investment, the Company has a preferred partner agreement with Topgolf in which the Company has preferred signage rights, rights as the preferred supplier of golf products used or offered for use at Topgolf facilities at prices no less than those paid by the Company’s customers, preferred retail positioning in the Topgolf retail stores, access to consumer information obtained by Topgolf, and other rights incidental to those listed above. The Company invested $21,499,000, $1,448,000 and $940,000 in shares of Topgolf in 2017, 2016 and 2015, respectively. In December, 2017, Topgolf announced that it had completed a private placement led by Fidelity Management and Research Company (the "Fidelity Investment"), in which the Company invested $20,000,000 in preferred shares of Topgolf. Due to the nature and timing of this transaction, the Company believes the carrying value of its series F preferred shares that were purchased in this private placement, approximates fair value as of December 31, 2017. The Company is unable to estimate the fair value of its other series of preferred stock or common stock due to the dissimilar nature of conversion rights, liquidation features and other preferred terms of these shares relative to the series F preferred shares. Further, it would not be practicable for the Company to determine the discount, if any, that would be applicable to any preferred terms, as well as any other rights provided to the holders of the various series of preferred stock, nor a premium, if any, for the incremental value that might apply in the case of a change in control transaction (e.g. an initial public offering or sale of Topgolf). The Company’s Topgolf shares are illiquid and there is no assurance that all classes of Topgolf shares would receive equivalent value upon a sale or other liquidation. Due to these factors, the Company believes that it is not practicable on a cost-benefit basis to estimate the fair value of its Topgolf shares. In February 2016, Topgolf announced that Providence Equity Partners L.L.C. (“Providence Equity”) made a significant minority preferred stock investment in Topgolf (the “Providence Equity Investment”). As required by the terms of the Providence Equity Investment, Topgolf used a portion of the proceeds it received to repurchase shares from its existing shareholders, other than Providence Equity (the “Topgolf Repurchase Program”). In April 2016, the Company sold approximately 10.0% or $5,767,000 (on a cost basis) of its preferred shares in Topgolf under the Topgolf Repurchase Program for $23,429,000, and recognized a gain of approximately $17,662,000 in other income (expense) during the second quarter. In December 2015, the Company and Topgolf entered into a shareholder loan agreement, which resulted in a note receivable from Topgolf for $3,200,000. The loan was subject to an annual interest rate of 10%, and was due and payable on March 30, 2016. The loan was paid in full in February 2016. As of December 31, 2017 and 2016, the Company's total investment in Topgolf was $70,495,000 and $48,997,000, respectively. The Company's ownership percentage at December 31, 2017 was approximately 14.0%. As of December 31, 2017, there were no impairment indicators present with respect to this investment. Based on prior observable market transactions, the Company believes that the fair value of its investment in Topgolf significantly exceeds its cost. In accordance with ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," if there are any observable price changes related to this investment or a similar investment of the same issuer, in fiscal years beginning after December 15, 2017, the Company would be required to assess the fair value impact, if any, on each class of stock, and write the individual security interest up or down to its estimated fair value, which could have a significant effect on the Company's financial position and results of operations. For further discussion, see “Recent Accounting Standards” in Note 2. The Company’s total ownership interest in Topgolf, including the Company's voting rights in the preferred shares of Topgolf, remains at less than 20.0% of the outstanding equity securities of Topgolf. Therefore, the Company does not have the ability to significantly influence the operating and financing activities and policies of Topgolf. Accordingly, this investment is accounted for at cost as of December 31, 2017.

Note 7. Investments

Investment in Topgolf International, Inc.

The Company owns a minority interest in Topgolf International, Inc., doing business as the Topgolf Entertainment Group (“Topgolf”), the owner and operator of Topgolf entertainment centers, which ownership consists of common stock and various classes of preferred stock. In connection with this investment, the Company has a preferred partner agreement with Topgolf in which the Company has preferred signage rights, rights as the preferred supplier of golf products used or offered for use at Topgolf facilities at prices no less than those paid by the Company’s customers, preferred retail positioning in the Topgolf retail stores, access to consumer information obtained by Topgolf, and other rights incidental to those listed above.

The Company invested $21,499,000, $1,448,000 and $940,000 in shares of Topgolf in 2017, 2016 and 2015, respectively.

In December, 2017, Topgolf announced that it had completed a private placement led by Fidelity Management and Research Company (the "Fidelity Investment"), in which the Company invested $20,000,000 in preferred shares of Topgolf. Due to the nature and timing of this transaction, the Company believes the carrying value of its series F preferred shares that were purchased in this private placement, approximates fair value as of December 31, 2017. The Company is unable to estimate the fair value of its other series of preferred stock or common stock due to the dissimilar nature of conversion rights, liquidation features and other preferred terms of these shares relative to the series F preferred shares. Further, it would not be practicable for the Company to determine the discount, if any, that would be applicable to any preferred terms, as well as any other rights provided to the holders of the various series of preferred stock, nor a premium, if any, for the incremental value that might apply in the case of a change in control transaction (e.g. an initial public offering or sale of Topgolf). The Company’s Topgolf shares are illiquid and there is no assurance that all classes of Topgolf shares would receive equivalent value upon a sale or other liquidation. Due to these factors, the Company believes that it is not practicable on a cost-benefit basis to estimate the fair value of its Topgolf shares.

In February 2016, Topgolf announced that Providence Equity Partners L.L.C. (“Providence Equity”) made a significant minority preferred stock investment in Topgolf (the “Providence Equity Investment”). As required by the terms of the Providence Equity Investment, Topgolf used a portion of the proceeds it received to repurchase shares from its existing shareholders, other than Providence Equity (the “Topgolf Repurchase Program”). In April 2016, the Company sold approximately 10.0% or $5,767,000 (on a cost basis) of its preferred shares in Topgolf under the Topgolf Repurchase Program for $23,429,000, and recognized a gain of approximately $17,662,000 in other income (expense) during the second quarter.

In December 2015, the Company and Topgolf entered into a shareholder loan agreement, which resulted in a note receivable from Topgolf for $3,200,000. The loan was subject to an annual interest rate of 10%, and was due and payable on March 30, 2016. The loan was paid in full in February 2016.

As of December 31, 2017 and 2016, the Company's total investment in Topgolf was $70,495,000 and $48,997,000, respectively. The Company's ownership percentage at December 31, 2017 was approximately 14.0%.

As of December 31, 2017, there were no impairment indicators present with respect to this investment. Based on prior observable market transactions, the Company believes that the fair value of its investment in Topgolf significantly exceeds its cost. In accordance with ASU No. 2016-01, "Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," if there are any observable price changes related to this investment or a similar investment of the same issuer, in fiscal years beginning after December 15, 2017, the Company would be required to assess the fair value impact, if any, on each class of stock, and write the individual security interest up or down to its estimated fair value, which could have a significant effect on the Company's financial position and results of operations. For further discussion, see “Recent Accounting Standards” in Note 2.

The Company’s total ownership interest in Topgolf, including the Company's voting rights in the preferred shares of Topgolf, remains at less than 20.0% of the outstanding equity securities of Topgolf. Therefore, the Company does not have the ability to significantly influence the operating and financing activities and policies of Topgolf. Accordingly, this investment is accounted for at cost as of December 31, 2017.