Regulatory Capital Requirements - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2015	Dec. 31, 2018	Dec. 31, 2017
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of capital buffer			11.40%	12.70%
Minimum
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of capital conservation buffer		0.00%
Maximum | Scenario Forecast
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Percentage of capital conservation buffer	2.50%