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Acquisitions - Asset Acquisition (Details) - USD ($) $ in Thousands			3 Months Ended		9 Months Ended
	Jun. 01, 2021	Apr. 01, 2021	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Asset acquisition, contingent consideration arrangements, range of outcomes, value, high		$ 225,000
Repurchase of non-controlling interest		11,200	$ 11,191	$ 0
Contingent consideration as part of asset acquisition		$ 27,200			$ 27,200	$ 0
U.S. Health
Business Acquisition [Line Items]
Ownership percentage by noncontrolling interest		4.53%
Health Savings Account Assets of Bell Bank’s Healthcare Bank Division
Business Acquisition [Line Items]
Cash consideration		$ 200,000
Deferred payments		25,000
Additional deferred payments		25,000
Decrease in payment of acquire business	$ 12,500
Additional deferred payments to acquire business	$ 12,500
Finite-lived intangible assets acquired		$ 263,400
Weighted average life (in years)		5 years 7 months 6 days
Deferred liability		$ 47,400

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

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The total amount of [all] liabilities that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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The cash outflow during the period for redemption of redeemable noncontrolling interests.

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