Loans (Analysis of Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	$ 40,317	$ 27,756
Unpaid Principal Balance Nonaccrual Loans	60,921	42,289
Secured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	25,187	11,524
Unpaid Principal Balance Nonaccrual Loans	35,843	21,503
Unsecured Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	26	31
Unpaid Principal Balance Nonaccrual Loans	1,342	303
One-to-Four Family Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	816	568
Unpaid Principal Balance Nonaccrual Loans	2,904	1,302
Commercial Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	2,333	934
Unpaid Principal Balance Nonaccrual Loans	2,629	922
Income Property Multifamily [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,586	4,005
Unpaid Principal Balance Nonaccrual Loans	4,702	4,247
Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	3,224	6,248
Unpaid Principal Balance Nonaccrual Loans	4,712	9,030
Land And Acquisition [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	26	14
Unpaid Principal Balance Nonaccrual Loans	803	102
Residential Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	213	549
Unpaid Principal Balance Nonaccrual Loans	2,568	549
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment Nonaccrual Loans	4,906	3,883
Unpaid Principal Balance Nonaccrual Loans	$ 5,418	$ 4,331