Regulatory Matters (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2015
Banking And Thrift [Line Items]
Permitted Assets Value Requirement To Continue Include Trust Preferred Securities In Tier One Capital	$ 15,000,000
Regulatory Restrictions on Payment of Dividends	If a California corporation does not have sufficient retained earnings available for the proposed dividend, it may still pay a dividend to its shareholders if immediately after the dividend the value of the company's assets would equal or exceed the sum of its total liabilities plus any preferred dividend arrears amount.
Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements	$ 48,956
Statutory Trust [Member]
Banking And Thrift [Line Items]
Percentage Of Trust Preferred Securities To Tier One Capital	25.00%
Statutory Trust [Member] | Maximum [Member]
Banking And Thrift [Line Items]
Excess Capital to Risk Weighted Assets	2.50%
Statutory Trust [Member] | Minimum [Member]
Banking And Thrift [Line Items]
Excess Capital to Risk Weighted Assets		0.00%