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Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	$ 33,060
Unpaid Principal Balance Nonaccrual Loans	45,209	$ 65,358
Recorded Investment Nonaccrual Loans		54,842
Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	2,018
Unpaid Principal Balance Nonaccrual Loans	2,355	3,149
Recorded Investment Nonaccrual Loans		2,949
Commercial business: Secured loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	26,615
Unpaid Principal Balance Nonaccrual Loans	38,278	45,072
Recorded Investment Nonaccrual Loans		35,504
Commercial business: Unsecured loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	359
Unpaid Principal Balance Nonaccrual Loans	360	9
Recorded Investment Nonaccrual Loans		9
Real estate: One-to-four family residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	591
Unpaid Principal Balance Nonaccrual Loans	632	1,178
Recorded Investment Nonaccrual Loans		1,158
Real estate: Commercial and multifamily residential: Commercial land [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	1,985
Unpaid Principal Balance Nonaccrual Loans	1,994	2,270
Recorded Investment Nonaccrual Loans		2,261
Real estate: Commercial and multifamiIy residential: Income property [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	205
Unpaid Principal Balance Nonaccrual Loans	206	3,062
Recorded Investment Nonaccrual Loans		2,721
Real estate: Commercial and multifamiIy residential: Owner occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	1,287
Unpaid Principal Balance Nonaccrual Loans	1,325	10,300
Recorded Investment Nonaccrual Loans		9,922
Real estate construction: One-to-four family residential: Land and acquisition [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	0
Unpaid Principal Balance Nonaccrual Loans	0	318
Recorded Investment Nonaccrual Loans		318
Real estate construction: One-to-four family residential: Residential construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	0
Unpaid Principal Balance Nonaccrual Loans	59	0
Recorded Investment Nonaccrual Loans		0
Loans, Excluding Purchased Credit Impaired Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	33,060	54,842
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	2,018	2,949
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	26,615	35,504
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	359	9
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	591	1,158
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	1,985	2,261
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	205	2,721
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	1,287	9,922
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Land and acquisition [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	0	318
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: One-to-four family residential: Residential construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	0	0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Income property [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	0	0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Nonaccrual	$ 0	$ 0

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