Estimated Fair Values (Fair Value Option) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 289	$ 50	$ 2,900
Disposal Group, Including Discontinued Operation, Loans Receivable, Net	67,900	45,500
Loans Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value Of Items For Which Fair Value Option Was Elected Assets	67,869	45,505
Aggregate Unpaid Principal Balance Of Items For Which Fair Value Option Was Elected Assets	65,697	44,073
Fair Value Option Aggregate Difference Assets	$ 2,172	$ 1,432