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Loans And Leases (Narrative) (Details) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2019 USD ($) loan | Jun. 30, 2018 USD ($) loan | Jun. 30, 2019 USD ($) loan | Jun. 30, 2018 USD ($) loan | Dec. 31, 2018 USD ($)
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Loans | $ 598,695,000 |  | $ 598,695,000 |  | $ 550,683,000
Cash payments of interest | 43,000 | $ 48,000 | 88,000 | $ 99,000 |
Loans 90 days or more past due and still accruing interest |  |  |  |  |
Number of days of default payment |  |  | 90 days |  |
Total TDR's | 3,111,000 |  | $ 3,111,000 |  | 3,161,000
Allocated specific reserves to modified TDRs | 20,000 |  | 20,000 |  | 22,000
Commitment to lend additional amounts | $ 0 |  | $ 0 |  | 0
Number of loans modified as a TDR | loan | 0 | 0 | 0 | 0 |
Number of TDRs in payment default | loan | 0 | 0 |  |  |
Recorded investment of loans undergoing modifications, not TDRs | $ 15,821,000 | $ 21,612,000 | $ 15,821,000 | $ 21,612,000 |
Accruing TDR's | 3,018,000 |  | 3,018,000 |  | 3,061,000
Loans And Leases Receivable Net Of Deferred Income | 605,724,000 |  | 605,724,000 |  | 557,695,000
Doubtful [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Loans And Leases Receivable Net Of Deferred Income | 0 |  | $ 0 |  | 0
Northpointe [Member] | Mortgage Purchase Program [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Average days |  |  | 14 days |  |
Percent of loans risk rated for capital adequacy |  |  | 100.00% |  |
Mortgage allowance | $ 0 |  | $ 0 |  |
Percent of participation agreement interest | 95.00% |  | 95.00% |  |
Ownership interest in each loan it participates |  |  | 5.00% |  |
Single-Family Residential[Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Loans And Leases Receivable Net Of Deferred Income | $ 131,517,000 |  | $ 131,517,000 |  | 118,386,000
Single-Family Residential[Member] | Northpointe [Member] | Mortgage Purchase Program [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Loans | 40,572,000 |  | 40,572,000 |  | 36,845,000
Commercial Portfolio Segment [Member] |  |  |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |  |  |
Loans And Leases Receivable Net Of Deferred Income | $ 146,450,000 |  | $ 146,450,000 |  | $ 126,887,000

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