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Loans And Leases (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) loan | Dec. 31, 2015 USD ($) loan
Accounts Notes And Loans Receivable [Line Items] |  |
Loans | $ 346,125 | $ 297,064
Loans 90 days or more past due and still accruing interest |  |
Total TDR's | 3,130 | 5,276
Allocated specific reserves to modified TDRs | $ 22 | $ 20
Number of loans modified as a TDR | loan | 1 | 2
TDR's charge-offs | $ 0 | $ 0
Number of TDRs in payment default | loan | 1 | 0
Northpointe [Member] | Mortgage Purchase Program [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Percent of loans risk rated for capital adequacy | 100.00% |
Percent of participation agreement interest | 95.00% |
Ownership interest in each loan is participates | 5.00% |
Nonaccrual [Member] | Commitments to Lend Additional Amounts [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total TDR's | $ 0 | $ 0
Single-Family Mortgage Loans [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of loans modified as a TDR | loan | 1 | 1
Single-Family Mortgage Loans [Member] | Northpointe [Member] | Mortgage Purchase Program [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Loans | $ 46,919 | $ 43,517
Home Equity Line of Credit, Originated Portfolio [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of loans modified as a TDR | loan | 1 | 1
Other Loans [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total TDR's | $ 33,294 | $ 19,097
Accruing [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Total TDR's | $ 2,986 | $ 4,920
Commercial [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Number of loans modified as a TDR | loan | 1 |
TDR's charge-offs | $ 239 |

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- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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