Loans And Leases (Narrative) (Details) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017 USD ($) loan	Jun. 30, 2016 USD ($) loan	Jun. 30, 2017 USD ($) loan	Jun. 30, 2016 USD ($) loan	Dec. 31, 2016 USD ($)
Accounts Notes And Loans Receivable [Line Items]
Loans		$ 365,849		$ 365,849		$ 346,125
Cash payments of interest		59	$ 84	114	$ 161
Loans 90 days or more past due and still accruing interest
Number of days of default payment				90 days
Total TDR's		3,829		$ 3,829		3,130
Allocated specific reserves to modified TDRs		28		28		22
Commitment to lend additional amounts		$ 0		$ 0		0
Number of loans modified as a TDR | loan		1	0	1	0
Number of TDRs in payment default | loan				0	1
Recorded investment of loans undergoing modifications, not TDRs		$ 7,296	$ 10,408	$ 7,296	$ 10,408
Accruing TDR's		3,705		$ 3,705		2,986
Period of timely payments before reversion to accruing status				6 months
Loans And Leases Receivable Net Of Deferred Income		372,807		$ 372,807		353,050
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 [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%		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		$ 95,724		$ 95,724		92,544
Single-Family Residential [Member] | Northpointe [Member] | Mortgage Purchase Program Member [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans		39,170		39,170		46,919
Commercial [Member]
Accounts Notes And Loans Receivable [Line Items]
Total TDR's		841		841
Loans And Leases Receivable Net Of Deferred Income	[1]	$ 83,504		$ 83,504		$ 71,334

[1] Includes $4,204 and $2,874 of commercial leases at June 30, 2017 and December 31, 2016, respectively.