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Employee Benefit Plans - Obligations and Funded Status (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined contribution plan expense | $ 52,629,000 | $ 50,031,000 | $ 46,030,000
Change in Benefit Obligation [Roll Forward] |  |  |
Settlements and Curtailments | (25,000) | (961,000) | (12,565,000)
Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Benefits paid |  | 38,093,000 |
Amounts Recognized in Balance Sheet [Abstract] |  |  |
Other liabilities (deferred compensation) | 177,623,000 | 165,150,000 |
Accumulated Other Comprehensive Loss (Earnings) [Abstract] |  |  |
Total Accumulated Other Comprehensive Loss (Earnings), net of tax | 88,126,000 | 97,525,000 |
Accumulated benefit obligation | 884,967,000 | 815,257,000 |
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract] |  |  |
Projected benefit obligation (PBO) | 383,244,000 | 348,137,000 |
Accumulated benefit obligation (ABO) | 364,895,000 | 331,126,000 |
Defined Benefit Plan Fair Value Of Plan Assets Gross | 203,314,000 | 177,057,000 |
Pension Plan [Member] | Qualified Plan [Member] | United States |  |  |
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 490,228,000 | 447,173,000 |
Service cost | 6,824,000 | 7,016,000 | 9,019,000
Interest cost | 16,272,000 | 19,026,000 | 20,756,000
Plan participants' contributions | 0 | 0 |
Benefits Paid | 36,303,000 | 38,093,000 |
Actuarial (gain) loss | 47,160,000 | 55,105,000 |
Amendments | 0 | 0 |
Settlements and Curtailments | 0 | 0 |
Currency translation and other | 0 | 1,000 |
Benefit obligation at end of year | 524,181,000 | 490,228,000 | 447,173,000
Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 550,238,000 | 488,900,000 |
Actual return on plan assets | 92,961,000 | 99,431,000 |
Company contributions | 0 | 0 |
Plan participant's contributions | 0 | 0 |
Benefits paid | 36,303,000 | 38,093,000 |
Settlements and curtailments | 0 | 0 | (74,016)
Foreign currency translation | 0 | 0 |
Fair value of plan assets at end of year | 606,896,000 | 550,238,000 | 488,900,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded (Unfunded) status | 82,715,000 | 60,010,000 |
Amounts Recognized in Balance Sheet [Abstract] |  |  |
Other assets and deferred charges | 82,715,000 | 60,010,000 |
Accrued compensation and employee benefits | 0 | 0 |
Other liabilities (deferred compensation) | 0 | 0 |
Total assets and liabilities | 82,715,000 | 60,010,000 |
Accumulated Other Comprehensive Loss (Earnings) [Abstract] |  |  |
Net actuarial losses (gains) | 49,386,000 | 71,247,000 |
Prior service cost (credit) | 322,000 | 549,000 |
Deferred taxes | (10,272,000) | (15,263,000) |
Total Accumulated Other Comprehensive Loss (Earnings), net of tax | 39,436,000 | 56,533,000 |
Net amount recognized on the balance sheet | 122,151,000 | 116,543,000 |
Accumulated benefit obligation | 511,292,000 | 476,357,000 |
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract] |  |  |
Defined Benefit Plan Fair Value Of Plan Assets Gross | 413,468,000 | 293,751,000 |
Pension Plan [Member] | Qualified Plan [Member] | Foreign Plan [Member] |  |  |
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 296,534,000 | 270,329,000 |
Service cost | 5,345,000 | 5,665,000 | 5,359,000
Interest cost | 3,697,000 | 5,101,000 | 4,962,000
Plan participants' contributions | 1,707,000 | 1,681,000 |
Benefits Paid | 8,613,000 | 9,298,000 |
Actuarial (gain) loss | 19,558,000 | 24,791,000 |
Amendments | (1,401,000) | 0 |
Settlements and Curtailments | (294,000) | (5,412,000) |
Currency translation and other | 24,296,000 | 3,677,000 |
Benefit obligation at end of year | 340,829,000 | 296,534,000 | 270,329,000
Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 185,590,000 | 162,589,000 |
Actual return on plan assets | 13,560,000 | 23,812,000 |
Company contributions | 7,315,000 | 7,247,000 |
Plan participant's contributions | 1,707,000 | 1,681,000 |
Benefits paid | 8,613,000 | 9,298,000 |
Settlements and curtailments | (294,000) | (4,350,000) |
Foreign currency translation | 13,483,000 | 3,909,000 |
Fair value of plan assets at end of year | 212,748,000 | 185,590,000 | 162,589,000
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded (Unfunded) status | (128,081,000) | (110,944,000) |
Amounts Recognized in Balance Sheet [Abstract] |  |  |
Other assets and deferred charges | 653,000 | 671,000 |
Accrued compensation and employee benefits | 1,691,000 | 1,526,000 |
Other liabilities (deferred compensation) | 127,043,000 | 110,089,000 |
Total assets and liabilities | (128,081,000) | (110,944,000) |
Accumulated Other Comprehensive Loss (Earnings) [Abstract] |  |  |
Net actuarial losses (gains) | 80,472,000 | 70,694,000 |
Prior service cost (credit) | (3,632,000) | (2,724,000) |
Deferred taxes | (17,144,000) | (15,492,000) |
Total Accumulated Other Comprehensive Loss (Earnings), net of tax | 59,696,000 | 52,478,000 |
Net amount recognized on the balance sheet | (68,385,000) | (58,466,000) |
Accumulated benefit obligation | 326,317,000 | 282,883,000 |
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract] |  |  |
Defined Benefit Plan Fair Value Of Plan Assets Gross | 133,625,000 | 117,223,000 |
Supplemental Employee Retirement Plans, Defined Benefit [Member] | Nonqualified Plan [Member] |  |  |
Change in Benefit Obligation [Roll Forward] |  |  |
Benefit obligation at beginning of year | 60,183,000 | 66,836,000 |
Service cost | 1,272,000 | 1,942,000 | 2,624,000
Interest cost | 1,765,000 | 2,670,000 | 3,204,000
Plan participants' contributions | 0 | 0 |
Benefits Paid | 12,324,000 | 13,617,000 |
Actuarial (gain) loss | 298,000 | 2,352,000 |
Amendments | 0 | 0 |
Settlements and Curtailments | 0 | 0 |
Currency translation and other | 0 | 0 |
Benefit obligation at end of year | 51,194,000 | 60,183,000 | 66,836,000
Change in Fair Value of Plan Assets [Roll Forward] |  |  |
Fair value of plan assets at beginning of year | 0 | 0 |
Actual return on plan assets | 0 | 0 |
Company contributions | 12,324,000 | 13,617,000 |
Plan participant's contributions | 0 | 0 |
Benefits paid | 12,324,000 | 13,617,000 |
Settlements and curtailments | 0 | 0 |
Foreign currency translation | 0 | 0 |
Fair value of plan assets at end of year | 0 | 0 | $ 0
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract] |  |  |
Funded (Unfunded) status | (51,194,000) | (60,183,000) |
Amounts Recognized in Balance Sheet [Abstract] |  |  |
Other assets and deferred charges | 0 | 0 |
Accrued compensation and employee benefits | 4,899,000 | 12,500,000 |
Other liabilities (deferred compensation) | 46,295,000 | 47,683,000 |
Total assets and liabilities | (51,194,000) | (60,183,000) |
Accumulated Other Comprehensive Loss (Earnings) [Abstract] |  |  |
Net actuarial losses (gains) | (18,400,000) | (20,556,000) |
Prior service cost (credit) | 4,593,000 | 6,288,000 |
Deferred taxes | 2,961,000 | 3,066,000 |
Total Accumulated Other Comprehensive Loss (Earnings), net of tax | (10,846,000) | (11,202,000) |
Net amount recognized on the balance sheet | (62,040,000) | (71,385,000) |
Accumulated benefit obligation | $ 47,358,000 | $ 56,017,000 |

X
- Definition The tax effect on the total net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References No definition available. + Details
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- Definition Fair value of plan assets of the defined benefit plan as of the balance sheet date before deduction of net non-benefit obligations which are considered reductions of plan assets. + References No definition available. + Details
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- Definition The net amount recognized in the balance sheet associated with the defined benefit plan(s) including the the net pension asset (liability) and accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition The amount of decrease that relates to an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Also includes the amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. + References No definition available. + Details
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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + 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 (e) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit. + 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 (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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- Definition Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + 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 (j) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 + Details
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- Definition Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + 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 (b)(1) -URI http://asc.fasb.org/extlink&oid=118255775&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=118257860&loc=d3e4179-114921 + Details
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- Definition Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan. + 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 (a)(4) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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