Employee Benefit Plans - Obligations and Funded Status (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Participants	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan expense	$ 50,031	$ 46,030	$ 43,447
Number of participants covered by post retirement benefit plans | Participants	409
Number of participants eligible for medical benefits | Participants	386
Change in Benefit Obligation [Roll Forward]
Settlements and Curtailments	$ 961	12,565	(3,844)
Change in Fair Value of Plan Assets [Roll Forward]
Benefits paid		18,172
Amounts Recognized in Balance Sheet [Abstract]
Other liabilities (deferred compensation)	165,150	167,930
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	97,525	102,932
Accumulated benefit obligation	815,257	756,194
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation (PBO)	348,137	330,168
Accumulated benefit obligation (ABO)	331,126	311,192
Defined Benefit Plan Fair Value Of Plan Assets Gross	177,057	154,673
Pension Plan [Member] | Qualified Plan [Member] | United States
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	447,173	566,389
Service cost	7,016	9,019	12,083
Interest cost	19,026	20,756	21,718
Plan participants' contributions	0	0
Benefits Paid	38,093	18,172
Actuarial (gain) loss	55,105	(48,104)
Amendments	0	69
Settlements and Curtailments	0	(78,896)
Currency translation and other	1	0
Business divestitures	0	(3,888)
Benefit obligation at end of year	490,228	447,173	566,389
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	488,900	617,840
Actual return on plan assets	99,431	(32,939)
Company contributions	0	0
Plan participant's contributions	0	0
Benefits paid	38,093	18,172
Settlements and curtailments	0	(74,016)
Foreign currency translation	0	0
Business divestitures	0	(3,813)
Fair value of plan assets at end of year	550,238	488,900	617,840
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Funded (Unfunded) status	60,010	41,727
Amounts Recognized in Balance Sheet [Abstract]
Other assets and deferred charges	60,010	41,727
Accrued compensation and employee benefits	0	0
Other liabilities (deferred compensation)	0	0
Total assets and liabilities	60,010	41,727
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	71,247	81,437
Prior service cost (credit)	549	852
Deferred taxes	(15,263)	(17,597)
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	56,533	64,692
Net amount recognized on the balance sheet	116,543	106,419
Accumulated benefit obligation	476,357	438,005
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan Fair Value Of Plan Assets Gross	293,751	267,762
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	227
Recognized actuarial loss (gain)	7,536
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	7,763
Pension Plan [Member] | Qualified Plan [Member] | Foreign Plan [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	270,329	278,188
Service cost	5,665	5,359	5,688
Interest cost	5,101	4,962	5,263
Plan participants' contributions	1,681	1,279
Benefits Paid	9,298	8,161
Actuarial (gain) loss	24,791	(19,533)
Amendments	0	3,073
Settlements and Curtailments	(5,412)	(1,813)
Currency translation and other	3,677	21,554
Business divestitures	0	(14,579)
Benefit obligation at end of year	296,534	270,329	278,188
Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	162,589	175,534
Actual return on plan assets	23,812	(8,490)
Company contributions	7,247	5,961
Plan participant's contributions	1,681	1,279
Benefits paid	9,298	8,161
Settlements and curtailments	(4,350)	(1,472)
Foreign currency translation	3,909	11,223
Business divestitures	0	(13,285)
Fair value of plan assets at end of year	185,590	162,589	175,534
Defined Benefit Plan, Funded (Unfunded) Status of Plan [Abstract]
Funded (Unfunded) status	(110,944)	(107,740)
Amounts Recognized in Balance Sheet [Abstract]
Other assets and deferred charges	671	919
Accrued compensation and employee benefits	1,526	1,493
Other liabilities (deferred compensation)	110,089	107,166
Total assets and liabilities	(110,944)	(107,740)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	70,694	66,480
Prior service cost (credit)	(2,724)	(72)
Deferred taxes	(15,492)	(14,861)
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	52,478	51,547
Net amount recognized on the balance sheet	(58,466)	(56,193)
Accumulated benefit obligation	282,883	258,109
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Defined Benefit Plan Fair Value Of Plan Assets Gross	117,223	103,906
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	(473)
Recognized actuarial loss (gain)	2,986
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	2,513
Supplemental Employee Retirement Plans, Defined Benefit [Member] | Nonqualified Plan [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	66,836	106,012
Service cost	1,942	2,624	2,473
Interest cost	2,670	3,204	4,076
Plan participants' contributions	0	0
Benefits Paid	13,617	19,352
Actuarial (gain) loss	2,352	(7,687)
Amendments	0	0
Settlements and Curtailments	0	(2,289)
Currency translation and other	0	0
Business divestitures	0	(15,676)
Benefit obligation at end of year	60,183	66,836	106,012
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	13,617	19,352
Plan participant's contributions	0	0
Benefits paid	13,617	19,352
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	(60,183)	(66,836)
Amounts Recognized in Balance Sheet [Abstract]
Other assets and deferred charges	0	0
Accrued compensation and employee benefits	12,500	13,219
Other liabilities (deferred compensation)	47,683	53,617
Total assets and liabilities	(60,183)	(66,836)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	(20,556)	(25,186)
Prior service cost (credit)	6,288	9,099
Deferred taxes	3,066	3,461
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	(11,202)	(12,626)
Net amount recognized on the balance sheet	(71,385)	(79,462)
Accumulated benefit obligation	56,017	60,080
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	1,695
Recognized actuarial loss (gain)	(1,858)
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	(163)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	7,849	8,595
Service cost	19	30	68
Interest cost	312	290	783
Plan participants' contributions	0	0
Benefits Paid	572	620
Actuarial (gain) loss	462	(446)
Amendments	0	0
Settlements and Curtailments	0	0
Currency translation and other	0	0
Business divestitures	0	0
Benefit obligation at end of year	8,070	7,849	8,595
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	572	620
Plan participant's contributions	0	0
Benefits paid	572	620
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	(8,070)	(7,849)
Amounts Recognized in Balance Sheet [Abstract]
Other assets and deferred charges	0	0
Accrued compensation and employee benefits	692	702
Other liabilities (deferred compensation)	7,378	7,147
Total assets and liabilities	(8,070)	(7,849)
Accumulated Other Comprehensive Loss (Earnings) [Abstract]
Net actuarial losses (gains)	(632)	(1,164)
Prior service cost (credit)	58	71
Deferred taxes	290	412
Total Accumulated Other Comprehensive Loss (Earnings), net of tax	(284)	(681)
Net amount recognized on the balance sheet	(8,354)	$ (8,530)
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Prior service cost (credit)	13
Recognized actuarial loss (gain)	(15)
Amounts that will be amortized from accumulated other comprehensive earnings (loss) in next fiscal year	$ (2)