Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 52,615	$ 54,842
Unpaid Principal Balance Nonaccrual Loans	64,231	65,358
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	35,577	35,504
Unpaid Principal Balance Nonaccrual Loans	46,496	45,072
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	9
Unpaid Principal Balance Nonaccrual Loans	0	9
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	923	1,158
Unpaid Principal Balance Nonaccrual Loans	1,018	1,178
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,570	2,261
Unpaid Principal Balance Nonaccrual Loans	2,577	2,270
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	1,108	2,721
Unpaid Principal Balance Nonaccrual Loans	1,118	3,062
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	9,623	9,922
Unpaid Principal Balance Nonaccrual Loans	9,960	10,300
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	0	318
Unpaid Principal Balance Nonaccrual Loans	0	318
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,814	2,949
Unpaid Principal Balance Nonaccrual Loans	$ 3,062	$ 3,149