Loans (Loans Individually And Collectively Evaluated For Impairment) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment - Loans	$ 9,908		$ 3,315
Collectively evaluated for impairment - Loans	2,764,148		2,542,106
Total Loans	2,774,056		2,545,421
Individually evaluated for impairment - Allowance for Loan Losses	1,419		527
Collectively evaluated for impairment - Allowance for Loan Losses	30,717		29,530
Ending balance, allowance	32,136	$ 30,843	30,057	$ 27,677	$ 27,524	$ 27,256
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment - Loans	159		131
Collectively evaluated for impairment - Loans	123,632		125,907
Total Loans	123,791		126,038
Individually evaluated for impairment - Allowance for Loan Losses	50
Collectively evaluated for impairment - Allowance for Loan Losses	1,494		1,408
Ending balance, allowance	1,544	1,527	1,408	1,174	1,112	928
Commercial Mortgages [Member] | Multifamily Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment - Loans	607,173		610,385
Total Loans	607,173		610,385
Collectively evaluated for impairment - Allowance for Loan Losses	5,921		6,119
Ending balance, allowance	5,921	5,806	6,119	6,346	6,805	6,858
Commercial Mortgages [Member] | Other Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment - Loans	416,183		371,142
Total Loans	416,183		371,142
Collectively evaluated for impairment - Allowance for Loan Losses	4,674		4,296
Ending balance, allowance	4,674	4,303	4,296	3,828	3,853	3,674
Commercial Mortgages [Member] | Owner-occupied Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment - Loans	7,637		558
Collectively evaluated for impairment - Loans	97,461		103,113
Total Loans	105,098		103,671
Individually evaluated for impairment - Allowance for Loan Losses	843
Collectively evaluated for impairment - Allowance for Loan Losses	842		959
Ending balance, allowance	1,685	998	959	1,175	1,093	1,047
Residential Mortgages [Member] | Closed End Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment - Loans	638		856
Collectively evaluated for impairment - Loans	1,426,917		1,237,575
Total Loans	1,427,555		1,238,431
Individually evaluated for impairment - Allowance for Loan Losses	19		45
Collectively evaluated for impairment - Allowance for Loan Losses	17,016		15,695
Ending balance, allowance	17,035	16,758	15,740	14,148	13,643	13,639
Residential Mortgages [Member] | Revolving Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment - Loans	1,474		1,770
Collectively evaluated for impairment - Loans	86,918		84,691
Total Loans	88,392		86,461
Individually evaluated for impairment - Allowance for Loan Losses	507		482
Collectively evaluated for impairment - Allowance for Loan Losses	696		919
Ending balance, allowance	1,203	1,339	1,401	913	927	1,016
Consumer And Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Collectively evaluated for impairment - Loans	5,864		9,293
Total Loans	5,864		9,293
Collectively evaluated for impairment - Allowance for Loan Losses	74		134
Ending balance, allowance	$ 74	$ 112	$ 134	$ 93	$ 91	$ 94