Regulatory Matters- Summary (Details)	Jun. 30, 2020	Dec. 31, 2019	Jan. 01, 2019	Jan. 01, 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common Equity Tier 1 required for capital adequacy purposes, ratio (as a percent)	4.50%	4.50%
Tier 1 required for capital adequacy purposes, ratio (as a percent)	6.00%	6.00%
Total capital required for capital adequacy purposes, ratio (as a percent)	8.00%	8.00%
Leverage required for capital adequacy purposes, ratio (as a percent)	4.00%	4.00%
Conservation Buffer Rule Starting January 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer (as a percent)				0.625%
Conservation Buffer Rule Subsequent to 2016
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer annual increase (as a percent)				0.625%
Conservation Buffer Rule
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Capital conservation buffer (as a percent)			2.50%