Nature of Business - Additional Information (Detail)	Mar. 31, 2021 Location State
Accounting Policies [Abstract]
Number of branches \| Location	365
Number of states \| State	11

The number of states the entity operates in as of the balance sheet date.

No definition available.

Name:	us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant