Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	$ 37,021	$ 54,842
Unpaid Principal Balance Nonaccrual Loans	48,126	65,358
Secured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	24,408	35,504
Unpaid Principal Balance Nonaccrual Loans	35,033	45,072
Unsecured Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	0	9
Unpaid Principal Balance Nonaccrual Loans	0	9
One-to-Four Family Residential [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	574	1,158
Unpaid Principal Balance Nonaccrual Loans	594	1,178
Commercial Land [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	2,562	2,261
Unpaid Principal Balance Nonaccrual Loans	2,570	2,270
Income Property Multifamily [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	997	2,721
Unpaid Principal Balance Nonaccrual Loans	997	3,062
Owner Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	6,524	9,922
Unpaid Principal Balance Nonaccrual Loans	6,633	10,300
Land And Acquisition [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	0	318
Unpaid Principal Balance Nonaccrual Loans	0	318
Consumer Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Recorded Investment Nonaccrual Loans	1,956	2,949
Unpaid Principal Balance Nonaccrual Loans	$ 2,299	$ 3,149