Subsequent events- Additional Information (Details) - Subsequent event - Branches closure - New York $ in Millions	3 Months Ended	10 Months Ended
Dec. 31, 2020 USD ($)	Oct. 27, 2020 USD ($) Employees Branches
Subsequent Events
Restructuring cost expected		$ 24.5
Restructuring and related cost incurred cost	$ 23.1
Number of branches closed \| Branches		11
Number of employees layoff \| Employees		83
Operating lease impairment loss		$ 20.0
Severance and related benefit costs		$ 2.4

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Number of employees laid off due to the closure of branches.

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Amount of loss from impairment of right-of-use asset from operating lease.

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Amount expected to be recognized in earnings for the specified restructuring cost.

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Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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