XML 76 R74.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Benefits - Net Periodic Pension Cost and Retirement Costs (Details) - USD ($)
3 Months Ended 12 Months Ended
Apr. 27, 2019
Apr. 25, 2020
Apr. 27, 2019
Apr. 28, 2018
Retirement Benefits [Abstract]        
Service cost     $ 851,000 $ 1,316,000
Interest cost     4,464,000 4,587,000
Expected return on plan assets     (4,544,000) (4,818,000)
Net amortization     2,556,000 3,120,000
Pension termination charge $ 32,700,000 $ (1,900,000) 32,671,000 0
Net periodic pension cost   $ 0 $ 35,998,000 $ 4,205,000