Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Name:	us-gaap_RevenueFromRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Related Party Transactions - Other (Details) $ in Millions	12 Months Ended
Related Party Transactions - Other (Details) $ in Millions	Dec. 31, 2021 USD ($) ft² property	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Area of real estate property (in sqft)	10,100,000
Undivided interest
Related Party Transaction [Line Items]
Area of real estate property (in sqft)	5,447
Affiliated entities \| Leased space rental
Related Party Transaction [Line Items]
Number of properties \| property	1
Lease cancellation, period of notice (in days)	90 days
Revenue from related parties \| $	$ 0.3	$ 0.3	$ 0.3
Chairman emeritus and employee \| Leased space rental
Related Party Transaction [Line Items]
Percentage of lease space occupied by Chairman emeritus and employee (as a percent)	15.00%