Employee Retirement Plans - Defined Contribution and Nonqualified Plans (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Defined contribution plan | |||
| Company's matching contributions | $ 3,899 | $ 3,627 | $ 1,700 |
| Non-discretionary employer contributions | 0 | 0 | 1,237 |
| Non-qualified benefit plan assets | 9,041 | 7,270 | |
| Non-qualified plan | |||
| Defined contribution plan | |||
| Expense | 523 | 553 | 542 |
| Amount accrued | $ 9,318 | $ 7,679 | $ 5,243 |
| X | ||||||||||
- Definition Represents amount of non-discretionary contributions made by an employer to a defined contribution plan. No definition available.
|
| X | ||||||||||
- Definition Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cost for defined contribution plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|