Fair Value Measurements (Summary Of Financial Assets Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	$ 417,464	$ 400,331
Derivative asset	4,123	1,793
Derivative liability	(4,123)	(1,793)
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets at Fair Value on a recurring basis	416,567	398,961
Fair Value, Measurements, Recurring [Member] | Federal Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	66,706	78,211
Fair Value, Measurements, Recurring [Member] | Obligations Of State And Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	47,645	47,564
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	273,460	239,888
Fair Value, Measurements, Recurring [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	9,424	9,415
Fair Value, Measurements, Recurring [Member] | Corporate Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	20,229	25,253
Fair Value, Measurements, Recurring [Member] | Derivative Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	4,123	1,793
Derivative liability	(5,020)	(3,163)
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets at Fair Value on a recurring basis	159	137
Fair Value, Measurements, Recurring [Member] | Level 1 Inputs [Member] | Corporate Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	159	137
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets at Fair Value on a recurring basis	416,408	398,824
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Federal Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	66,706	78,211
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Obligations Of State And Political Subdivisions [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	47,645	47,564
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Residential Mortgage-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	273,460	239,888
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Asset-Backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	9,424	9,415
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Corporate Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities	20,070	25,116
Fair Value, Measurements, Recurring [Member] | Level 2 Inputs [Member] | Derivative Instrument [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	4,123	1,793
Derivative liability	$ (5,020)	$ (3,163)