Employee Deferred Compensation Plan Obligations - Compensation Expense Related to Qualified and Nonqualified Plans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred Compensation Plans [Abstract]
Contribution expense	$ 47,119	$ 42,092	$ 26,122
Increase in employee deferred compensation expense related to changes in the fair value of trust assets	61,078	75,188	54,917
Total compensation expense related to qualified defined contribution plans and nonqualified plans	$ 108,197	$ 117,280	$ 81,039

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 30
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

Name:	us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration