Restricted Cash Balances	9 Months Ended
	Sep. 30, 2021
Restricted Cash [Abstract]
Restricted Cash Balances	RESTRICTED CASH BALANCESThe FRBSF establishes cash reserve requirements that its member banks must maintain based on a percentage of deposit liabilities. On March 26, 2020, the FRBSF reduced the reserve requirement ratios to zero percent. There was no average reserves required to be held at the FRBSF for the nine months ended September 30, 2021. The average reserves required to be held at the FRBSF for the nine months ended September 30, 2020 was $55.2 million. As of September 30, 2021 and December 31, 2020, we pledged cash collateral for our derivative contracts of $2.0 million and $2.9 million.