Basis of Presentation And Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands			3 Months Ended
	Mar. 27, 2020 USD ($)	Mar. 23, 2020 USD ($)	Mar. 31, 2020 USD ($) Segment	Dec. 31, 2019 USD ($)
Significant Accounting Policies [Line Items]
Retained earnings			$ 301,243	$ 313,364
Number of identified portfolio segments | Segment			6
Offering unsecured personal loans, percentage		2.95%
Maximum [Member]
Significant Accounting Policies [Line Items]
Certificate of deposit penalty fees for withdrawals		$ 20,000
Offering unsecured personal loans, amount		$ 5,000
Offering unsecured personal loans, period		60 months
CARES Act [Member]
Significant Accounting Policies [Line Items]
Estimated amount of relief fund	$ 2,200
ASU 2016-13 [Member]
Significant Accounting Policies [Line Items]
Retained earnings			$ (8,700)
Increase in the allowance for credit losses on loans			9,600
Increase (decrease) in deferred tax assets			3,000
ASU 2016-13 [Member] | Held To Maturity Investment Securities [Member]
Significant Accounting Policies [Line Items]
Increase in the allowance for credit losses on loans			14
ASU 2016-13 [Member] | Unfunded Commitments [Member]
Significant Accounting Policies [Line Items]
Increase in the allowance for credit losses on loans			$ 2,100