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Retirement Plans - Fair Value Measurements and Expected Benefit Payments for Defined Benefit Pension Plans (Details) - Defined Benefit Pension Plans - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | $ 32,874 | $ 829,420 | $ 710,663
Expected benefit payments for defined benefit pension plans |  |  |
2022 | 4,383 |  |
2023 | 4,186 |  |
2024 | 4,141 |  |
2025 | 4,116 |  |
2026 | 3,987 |  |
2027 — 2031 | 25,810 |  |
Plan assets measured at fair value, net |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 32,819 | 827,913 |
Plan assets measured at fair value, net | Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 4,798 | 5,252 |
Plan assets measured at fair value, net | Common or collective trusts - Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 758 | 230,135 |
Plan assets measured at fair value, net | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 45 | 532 |
Plan assets measured at fair value, net | Government securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 9,287 | 12,036 |
Plan assets measured at fair value, net | Common or collective trusts - Debt securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 0 | 507,691 |
Plan assets measured at fair value, net | Guaranteed investment contracts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 17,931 | 20,588 |
Plan assets measured at fair value, net | Common or collective trusts - Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 0 | 51,679 |
Plan assets not measured at fair value, net |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 55 | 1,507 |
Level 1 | Plan assets measured at fair value, net |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 4,798 | 5,252 |
Level 1 | Plan assets measured at fair value, net | Common Stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 4,798 | 5,252 |
Level 2 | Plan assets measured at fair value, net |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 10,090 | 802,073 |
Level 2 | Plan assets measured at fair value, net | Common or collective trusts - Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 758 | 230,135 |
Level 2 | Plan assets measured at fair value, net | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 45 | 532 |
Level 2 | Plan assets measured at fair value, net | Government securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 9,287 | 12,036 |
Level 2 | Plan assets measured at fair value, net | Common or collective trusts - Debt securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 0 | 507,691 |
Level 2 | Plan assets measured at fair value, net | Common or collective trusts - Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 0 | 51,679 |
Level 3 |  |  |
Reconciliation of the beginning and ending balances of the fair value measurements using significant unobservable inputs (Level 3): |  |  |
Balance at beginning of year | 20,588 | 19,650 |
Actual return on plan assets: Assets still held at reporting date | (1,565) | 2,092 |
Actual return on plan assets: Assets sold during the period | 0 | 0 |
Purchases | 224 | 343 |
Settlements | (1,316) | (1,497) |
Balance at end of year | 17,931 | 20,588 |
Level 3 | Plan assets measured at fair value, net |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | 17,931 | 20,588 |
Level 3 | Plan assets measured at fair value, net | Guaranteed investment contracts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets, net | $ 17,931 | $ 20,588 |

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- Definition Amount, measured using unobservable inputs, of increase (decrease) in plan assets of defined benefit plan from actual return (loss) on assets sold. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02)(A) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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