Allowance for Loan Losses (Summary of Internal Loan Grades Applied to Loan Portfolio) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Allowance for Loan Losses [Line Items]
Total	$ 564,147	$ 519,779
Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	544,252	497,697
Special Mention [Member]
Allowance for Loan Losses [Line Items]
Total	13,238	8,424
Substandard [Member]
Allowance for Loan Losses [Line Items]
Total	6,653	13,653
Loss [Member]
Allowance for Loan Losses [Line Items]
Total	4	5
Real Estate Loans: One-to-Four Family [Member]
Allowance for Loan Losses [Line Items]
Total	171,570	158,826
Real Estate Loans: One-to-Four Family [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	169,319	156,931
Real Estate Loans: One-to-Four Family [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Total	2,251	1,895
Real Estate Loans: Home Equity [Member]
Allowance for Loan Losses [Line Items]
Total	50,633	48,071
Real Estate Loans: Home Equity [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	49,768	47,167
Real Estate Loans: Home Equity [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Total	865	904
Real Estate Loans: Commercial [Member]
Allowance for Loan Losses [Line Items]
Total	295,582	266,525
Real Estate Loans: Commercial [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	283,639	252,391
Real Estate Loans: Commercial [Member] | Special Mention [Member]
Allowance for Loan Losses [Line Items]
Total	10,894	6,682
Real Estate Loans: Commercial [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Total	1,049	7,452
Real Estate Loans: Commercial [Member] | Loans First Deemed To Be TDRs [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Total		7,000
Real Estate Loans: Construction - Commercial [Member]
Allowance for Loan Losses [Line Items]
Total	23,241	21,824
Real Estate Loans: Construction - Commercial [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	23,241	21,824
Other Loans: Commercial [Member]
Allowance for Loan Losses [Line Items]
Total	$ 21,950	23,216
PPP loans outstanding		$ 4,600
PPP loans guaranteed by SBA, percent	100.00%	100.00%
Other Loans: Commercial [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	$ 17,133	$ 18,076
PPP loans outstanding		$ 4,600
PPP loans guaranteed by SBA, percent	100.00%	100.00%
Other Loans: Commercial [Member] | Special Mention [Member]
Allowance for Loan Losses [Line Items]
Total	$ 2,344	$ 1,742
Other Loans: Commercial [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Total	2,473	3,398
Other Loans: Consumer [Member]
Allowance for Loan Losses [Line Items]
Total	1,171	1,317
Other Loans: Consumer [Member] | Pass/ Performing [Member]
Allowance for Loan Losses [Line Items]
Total	1,152	1,308
Other Loans: Consumer [Member] | Substandard [Member]
Allowance for Loan Losses [Line Items]
Total	15	4
Other Loans: Consumer [Member] | Loss [Member]
Allowance for Loan Losses [Line Items]
Total	$ 4	$ 5