Summary of Investments (Narrative) (Details) $ in Thousands	1 Months Ended
Dec. 31, 2019 USD ($) date	Mar. 31, 2021 USD ($)
Investments, Debt and Equity Securities [Abstract]
Remaining potential contractual obligation		$ 6,061
Investment in limited liability partnership investment fund	$ 25,000
Lockup period	3 years
Minimum notice period	60 days
Number of possible repurchase dates \| date	4
Investment fair value		$ 24,889

The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration