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Loans (Analysis of the Aged Loan Portfolio) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | $ 39,038 | $ 54,842
Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 8,504,574 | 8,218,651
Past Due Loans | 18,648 | 28,258
Nonaccrual Loans | 39,038 | 54,842
Total Loans | 8,562,260 | 8,301,751
Secured Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 23,982 | 35,504
Secured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 3,471,016 | 3,267,709
Past Due Loans | 7,397 | 9,488
Nonaccrual Loans | 23,982 | 35,504
Total Loans | 3,502,395 | 3,312,701
Unsecured Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 15 | 9
Unsecured Loans [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 128,865 | 111,868
Past Due Loans | 438 | 240
Nonaccrual Loans | 15 | 9
Total Loans | 129,318 | 112,117
One-to-Four Family Residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 860 | 1,158
One-to-Four Family Residential [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 274,537 | 233,941
Past Due Loans | 3,321 | 927
Nonaccrual Loans | 860 | 1,158
Total Loans | 278,718 | 236,026
Commercial Land [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 2,565 | 2,261
Commercial Land [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 289,574 | 283,416
Past Due Loans | 0 | 0
Nonaccrual Loans | 2,565 | 2,261
Total Loans | 292,139 | 285,677
Income Property Multifamily [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 1,814 | 2,721
Income Property Multifamily [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,946,429 | 1,910,505
Past Due Loans | 1,022 | 7,250
Nonaccrual Loans | 1,814 | 2,721
Total Loans | 1,949,265 | 1,920,476
Owner Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 7,464 | 9,922
Owner Occupied [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 1,640,358 | 1,606,085
Past Due Loans | 3,492 | 1,744
Nonaccrual Loans | 7,464 | 9,922
Total Loans | 1,651,314 | 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 | 1,683 | 4,099
Past Due Loans | 0 | 0
Nonaccrual Loans | 0 | 318
Total Loans | 1,683 | 4,417
Residential Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 199,154 | 212,303
Past Due Loans | 0 | 93
Nonaccrual Loans | 0 | 0
Total Loans | 199,154 | 212,396
Income Property Multifamily Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 163,074 | 194,912
Past Due Loans | 0 | 0
Nonaccrual Loans | 0 | 0
Total Loans | 163,074 | 194,912
Owner Occupied Construction [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 87,561 | 79,805
Past Due Loans | 2,204 | 7,258
Nonaccrual Loans | 0 | 0
Total Loans | 89,765 | 87,063
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Nonaccrual Loans | 2,338 | 2,949
Consumer Portfolio Segment [Member] | Loans, Excluding Purchased Credit Impaired Loans [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current Loans | 302,323 | 314,008
Past Due Loans | 774 | 1,258
Nonaccrual Loans | 2,338 | 2,949
Total Loans | 305,435 | 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 | 6,531 | 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 | 3,294 | 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 | 0 | 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 | 352 | 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 | 0 | 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 | 511 | 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 | 2,204 | 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 | 170 | 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 | 12,117 | 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 | 4,103 | 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 | 438 | 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 | 2,969 | 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 | 0 | 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 | 1,022 | 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 | 2,981 | 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 | 0 | 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 | 0 | 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 | 604 | 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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