Loans And Leases (Narrative) (Details)	3 Months Ended
Mar. 31, 2020 USD ($) loan	Mar. 31, 2019 USD ($) loan	Dec. 31, 2019 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Loans	$ 707,868,000		$ 663,303,000
Loans 90 days or more past due and still accruing interest
Total TDR's	2,924,000		2,923,000
Allocated specific reserves to modified TDRs	$ 21,000		22,000
Number of loans modified as a TDR \| loan	0	0
Number of TDRs in payment default \| loan	0	0
Cash payments of interest	$ 42,000	$ 46,000
Recorded investment of loans undergoing modifications, not TDRs	$ 17,295,000	$ 5,183,000
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%
Percent of participation agreement interest	95.00%
Ownership interest in each loan is participates	5.00%
Allowance allocated loans	$ 0
Single-Family Residential [Member] \| Northpointe [Member] \| Mortgage Purchase Program [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans	19,799,000		26,046,000
Accruing [Member]
Accounts Notes And Loans Receivable [Line Items]
Total TDR's	$ 2,924,000		$ 2,838,000

Allocated specific reserves to modified TDRs.

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Average Days For Mortgage Purchase Interest Process

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Loans Modified Not Troubled Debt Restructurings Recorded Investment

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Loans Participation Agreement Percentage

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Ownership Interest In Each Loan

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Percent Of Loans Held Risk Rated For Capital Adequacy

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The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio.

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Number of financing receivables that have been modified by troubled debt restructurings.

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Amount of financing receivable modified as troubled debt restructuring.

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Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

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Amount of financing receivable 90 days or more past due and still accruing.

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Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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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.

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