Allowance for Credit Losses on Loans and Leases - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Valuation Allowance [Line Items]
COVID-19 pandemic, impacts	For the six months ended June 30, 2022, the allowance for credit losses on loan and leases increased primarily as a result of loan portfolio growth combined with reduced prepayment estimates offset by improvements in environmental factors surrounding the COVID-19 pandemic, specifically those affecting commercial real estate in the New York City area.  The macroeconomic forecast factors in increasing costs of higher global energy prices and tighter financial market conditions on the U.S. economy. Gross Domestic Product (“GDP”) is now expected to rise at an annualized rate of 2.8% and 2.7% respectively for 2022 and 2023. Unemployment continues to subside from the historic shock of 2020, as peak unemployment rates are forecasted to be approximately 3.5% in 2022 and 3.4% in 2023. Federal Reserve continues to aggressively tighten monetary policy. As a result, the federal funds rate is now forecast to average 1.1% in 2022 and 2.7% in 2023, compared with 0.5% in 2022 and 1.5% in 2023 in the previous quarter Baseline scenario. The 10-year U.S. Treasury yield is expected to steadily increase over the next few years, reaching its estimated long-run equilibrium of 3.75% by mid-decade.  In addition to these quantitative inputs, several qualitative factors were considered in estimating our allowance for loan and lease credit losses, including changes in credit policies and underwriting guidelines and laws and regulations as well as other attributes related to a concentrated commercial real estate portfolio, specifically those affecting commercial real estate in the New York City area.
Unfunded Loan Commitment [Member]
Valuation Allowance [Line Items]
Allowance for credit losses	$ 7	$ 12