Regulatory Capital Requirements - Additional Information (Details)	12 Months Ended
Dec. 31, 2019	Sep. 30, 2020
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of capital buffer	10.60%	8.90%
Maximum
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of capital conservation buffer	2.50%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Balance Type:	na
Period Type:	duration