pre_text: ADVANCED ENERGY INDUSTRIES, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS – (continued) (in thousands, except per share amounts) The information provided below includes one pension plan which is part of discontinued operations. As such, all related liabilities and expenses are reported in discontinued operations in the Company’s Consolidated Balance Sheets and Consolidated Statements of Operations for all periods presented. The components of net periodic pension benefit cost recognized in our Consolidated Statements of Operations for the periods presented are as follows:
table: Years Ended December 31,
table: 2019 2018 2017
table: Service cost $272 $841 $  —
table: Interest cost 1,211 802 809
table: Expected return on plan assets (615) (665) (597)
table: Amortization of actuarial gains and losses 411 478 503
table: Net periodic pension cost $1,279 $1,456 $715
question: Analyse this data from a financial earnings document. What was the change in Amortization of actuarial gains and losses between 2017 and 2018?