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Loans Loans (Analysis of Troubled Debt Restructurings) (Details) loan in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) Modifications contract | Dec. 31, 2017 USD ($) loan Modifications contract | Dec. 31, 2016 USD ($) Modifications contract
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable Modifications Additional Commitment To Lend | $ 2,100,000 | $ 506,000 |
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | contract | 0 | 0 | 0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment | $ 0 | $ 0 | $ 0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans | loan |  | 0.0 |
Loans, Excluding Purchased Credit Impaired Loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 34 | 60 | 54
Pre-Modification Outstanding Recorded Investment | $ 22,047,000 | $ 18,122,000 | $ 7,679,000
Post-Modification Outstanding Recorded Investment | $ 22,047,000 | $ 18,122,000 | $ 7,677,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Secured loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 12 | 10 | 9
Pre-Modification Outstanding Recorded Investment | $ 18,379,000 | $ 5,655,000 | $ 2,131,000
Post-Modification Outstanding Recorded Investment | $ 18,379,000 | $ 5,655,000 | $ 2,131,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Commercial business: Unsecured loans [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 0 | 1 | 0
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 26,000 | $ 0
Post-Modification Outstanding Recorded Investment | $ 0 | $ 26,000 | $ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: One-to-four family residential [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 0 | 3 | 3
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 583,000 | $ 203,000
Post-Modification Outstanding Recorded Investment | $ 0 | $ 583,000 | $ 203,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamily residential: Commercial land [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 0 | 1 | 0
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 687,000 | $ 0
Post-Modification Outstanding Recorded Investment | $ 0 | $ 687,000 | $ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Income property [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 1 | 1 | 0
Pre-Modification Outstanding Recorded Investment | $ 891,000 | $ 1,152,000 | $ 0
Post-Modification Outstanding Recorded Investment | $ 891,000 | $ 1,152,000 | $ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate: Commercial and multifamiIy residential: Owner occupied [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 0 | 1 | 1
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 78,000 | $ 250,000
Post-Modification Outstanding Recorded Investment | $ 0 | $ 78,000 | $ 250,000
Loans, Excluding Purchased Credit Impaired Loans [Member] | Real estate construction: Commercial and multifamily residential: Owner occupied [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 0 | 1 | 0
Pre-Modification Outstanding Recorded Investment | $ 0 | $ 4,050,000 | $ 0
Post-Modification Outstanding Recorded Investment | $ 0 | $ 4,050,000 | $ 0
Loans, Excluding Purchased Credit Impaired Loans [Member] | Consumer [Member] |  |  |
Financing Receivable, Modifications [Line Items] |  |  |
Financing Receivable, Modifications, Number of Contracts | Modifications | 21 | 42 | 41
Pre-Modification Outstanding Recorded Investment | $ 2,777,000 | $ 5,891,000 | $ 5,095,000
Post-Modification Outstanding Recorded Investment | $ 2,777,000 | $ 5,891,000 | $ 5,093,000

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