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Loans Receivable - Past Due Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | $ 6,809 | $ 4,931
Recorded Investment, Loans Not Past Due | 1,260,092 | 1,321,501
Recorded investment, total | 1,266,901 | 1,326,432
Commercial Leases Investment Rated [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 505
Recorded Investment, Loans Not Past Due | 144,380 | 166,713
Recorded investment, total | 144,380 | 167,218
Commercial Loans Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 3,084 | 0
Recorded Investment, Loans Not Past Due | 143,727 | 133,958
Recorded investment, total | 146,811 | 133,958
Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 4 | 44
Recorded Investment, Loans Not Past Due | 1,872 | 1,508
Recorded investment, total | 1,876 | 1,552
Commercial Loans Health Care [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Loans Not Past Due | 80,022 | 85,418
Recorded investment, total | 80,022 | 85,418
Commercial Loans Municipal [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Recorded Investment, Loans Not Past Due | 44,620 | 62,719
Recorded investment, total | 44,620 | 62,719
Commercial loans - unsecured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Commercial loans - Secured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Recorded Investment, Loans Not Past Due | 29,568 | 39,712
Recorded investment, total | 29,568 | 39,712
Land Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Recorded Investment, Loans Not Past Due | 111 | 169
Recorded investment, total | 111 | 169
Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 2,080 | 270
Recorded Investment, Loans Not Past Due | 140,692 | 149,271
Recorded investment, total | 142,772 | 149,541
Wholesale Commercial Lending [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Recorded Investment, Loans Not Past Due | 348,878 | 340,470
Recorded investment, total | 348,878 | 340,470
Multi Family Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 458
Recorded Investment, Loans Not Past Due | 264,086 | 275,283
Recorded investment, total | 264,086 | 275,741
One To Four Family Residential Real Estate Loans Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 540 | 475
Recorded Investment, Loans Not Past Due | 11,412 | 12,460
Recorded investment, total | 11,952 | 12,935
One to Four Family Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 1,101 | 3,179
Recorded Investment, Loans Not Past Due | 50,724 | 53,820
Recorded investment, total | 51,825 | 56,999
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 3,540 | 2,770
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Leases Investment Rated [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 505
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loans Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 3,052 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 3 | 40
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Loans Municipal [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial loans - unsecured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial loans - Secured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Land Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Wholesale Commercial Lending [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Multi Family Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 458
Financing Receivables, 30 to 59 Days Past Due [Member] | One To Four Family Residential Real Estate Loans Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 362 | 387
Financing Receivables, 30 to 59 Days Past Due [Member] | One to Four Family Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 123 | 1,380
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 1,831 | 921
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Leases Investment Rated [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due |  | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 32 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 1 | 4
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans Health Care [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 |
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Loans Municipal [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial loans - unsecured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial loans - Secured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Land Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 1,560 | 270
Financing Receivables, 60 to 89 Days Past Due [Member] | Wholesale Commercial Lending [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Multi Family Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | One To Four Family Residential Real Estate Loans Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 8 | 10
Financing Receivables, 60 to 89 Days Past Due [Member] | One to Four Family Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 230 | 637
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Leases Investment Rated [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 1,438 | 1,240
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans Other [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans Health Care [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Loans Municipal [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial loans - unsecured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial loans - Secured [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Land Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 520 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Wholesale Commercial Lending [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Multi Family Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 0 | 0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One To Four Family Residential Real Estate Loans Non Owner Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | 170 | 78
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | One to Four Family Residential Real Estate Loans [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Recorded Investment, Total Past Due | $ 748 | $ 1,162

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