Supplemental Financial Information - Pension Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Jan. 04, 2020 |
Dec. 29, 2018 |
|
| Condensed Financial Information [Abstract] | ||
| Interest cost | $ 1,237 | $ 1,512 |
| Expected return on plan assets | (1,846) | (1,905) |
| Amortization of prior loss | 430 | 689 |
| Net periodic benefit cost | (179) | 296 |
| Amortization of prior loss, recognized in other comprehensive income | 430 | 689 |
| Total recognized in net periodic pension benefit cost and other comprehensive income | $ (609) | $ (393) |