Regulatory Matters - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 26, 2020	Dec. 31, 2019
Banking And Thrift [Abstract]
Describes the potential impact of COVID-19	On March 27, 2020, the federal banking agencies issued an interim final rule to delay the estimated impact on regulatory capital stemming from the adoption of CECL. The agencies granted this relief to allow institutions to focus on lending to customers in light of recent strains on the U.S economy due to COVID-19, while also maintaining the quality of regulatory capital. Under the interim final rule, 100% of the CECL Day 1 impact and 25% of subsequent provisions for credit losses (“Day 2” impacts) will be deferred over a two-year year period ending January 1, 2022, at which time it this deferred amount will be phased in on a pro rata basis over a three-year period ending January 2025.
Cash on hand	$ 137.3
Reserve requirement with FRB	$ 0.0		$ 246.0
Reserve requirement ratio with FRB		0.00%