XML 67 R78.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Pension and Other Post Retirement Benefit Plans - Components of Net Periodic Benefit Cost for Company's Defined Benefit Plans (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
United States      
Net periodic benefit cost:      
Service cost     $ 101
Interest cost $ 127 $ 114 111
Amortization of prior service cost and actuarial loss     509
Net periodic benefit cost $ 127 $ 114 $ 721
Assumptions:      
Discount rate 3.65% 2.95% 3.25%
German Plan      
Net periodic benefit cost:      
Interest cost $ 147 $ 147 $ 130
Expected return on plan assets (126) (130) (121)
Amortization of prior service cost and actuarial loss 72 73 78
Net periodic benefit cost $ 93 $ 90 $ 87
Assumptions:      
Discount rate 1.06% 2.04% 1.93%
Long-term return on assets 3.10% 3.40% 3.40%