Fair Value Of Financial Instruments (Narrative) (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans individually evaluated for loss	$ 1,100		$ 4,100
Significant Unobservable Inputs (Level 3) [Member] | One- to Four-Family Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	219		93
Significant Unobservable Inputs (Level 3) [Member] | Commercial Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	0		0
Fair Value, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	746,949	$ 1,397,500
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair Value Disclosure	0	$ 0
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans individually evaluated for loss	1,100		4,100
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | One- to Four-Family Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	219		93
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Commercial Segment [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	$ 0		$ 0
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Estimated Selling Costs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input	0.10
OREO, measurement input	0.10
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Lack of Marketability [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input	0.05		0.08
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Lack of Marketability [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input	1		1
Fair Value, Nonrecurring [Member] | Significant Unobservable Inputs (Level 3) [Member] | Lack of Marketability [Member] | Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans receivable, measurement input	0.17		0.21