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Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | $ 37,021 | $ 54,842
Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 8,612,450 | 8,218,651
Past Due Loans | 25,107 | 28,258
Nonaccrual Loans | 37,021 | 54,842
Total Loans | 8,674,578 | 8,301,751
Secured Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 24,408 | 35,504
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 3,525,753 | 3,267,709
Past Due Loans | 5,822 | 9,488
Nonaccrual Loans | 24,408 | 35,504
Total Loans | 3,555,983 | 3,312,701
Unsecured Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 0 | 9
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 138,947 | 111,868
Past Due Loans | 426 | 240
Nonaccrual Loans | 0 | 9
Total Loans | 139,373 | 112,117
One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 574 | 1,158
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 269,593 | 233,941
Past Due Loans | 2,866 | 927
Nonaccrual Loans | 574 | 1,158
Total Loans | 273,033 | 236,026
Commercial Land [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 2,562 | 2,261
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 292,594 | 283,416
Past Due Loans | 140 | 0
Nonaccrual Loans | 2,562 | 2,261
Total Loans | 295,296 | 285,677
Income Property Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 997 | 2,721
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,955,634 | 1,910,505
Past Due Loans | 5,304 | 7,250
Nonaccrual Loans | 997 | 2,721
Total Loans | 1,961,935 | 1,920,476
Owner Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 6,524 | 9,922
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,689,919 | 1,606,085
Past Due Loans | 1,865 | 1,744
Nonaccrual Loans | 6,524 | 9,922
Total Loans | 1,698,308 | 1,617,751
Land And Acquisition [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 0 | 318
Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,614 | 4,099
Past Due Loans | 0 | 0
Nonaccrual Loans | 0 | 318
Total Loans | 1,614 | 4,417
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 192,563 | 212,303
Past Due Loans | 0 | 93
Nonaccrual Loans | 0 | 0
Total Loans | 192,563 | 212,396
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 151,362 | 194,912
Past Due Loans | 6,038 | 0
Nonaccrual Loans | 0 | 0
Total Loans | 157,400 | 194,912
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 100,610 | 79,805
Past Due Loans | 1,636 | 7,258
Nonaccrual Loans | 0 | 0
Total Loans | 102,246 | 87,063
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 1,956 | 2,949
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 293,861 | 314,008
Past Due Loans | 1,010 | 1,258
Nonaccrual Loans | 1,956 | 2,949
Total Loans | 296,827 | 318,215
Financial Asset, 60 to 89 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 4,369 | 6,299
Financial Asset, 60 to 89 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 262 | 3,624
Financial Asset, 60 to 89 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 2 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 437 | 233
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 3,266 | 2,241
Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 138 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 264 | 201
Financial Asset, 30 to 59 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 20,738 | 21,959
Financial Asset, 30 to 59 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 5,560 | 5,864
Financial Asset, 30 to 59 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 424 | 240
Financial Asset, 30 to 59 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 2,429 | 694
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 140 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 2,038 | 5,009
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 1,727 | 1,744
Financial Asset, 30 to 59 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 93
Financial Asset, 30 to 59 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 6,038 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 1,636 | 7,258
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 746 | 1,057
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Land And Acquisition [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Past Due Loans | $ 0 | $ 0

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