Accumulated Other Comprehensive Income (Changes in Other Comprehensive Income by Components) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net unrealized gains on securities available for sale
Accumulated Other Comprehensive Income [Line Items]
Beginning balance	$ (15,518,000)	$ 256,000	$ (2,638,000)	$ 2,209,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(5,607,000)	1,185,000	(18,361,000)	(726,000)
Reclassification Out Of Accumulated Other Comprehensive Income	(63,000)	(70,000)	(189,000)	(112,000)
Other Comprehensive Income (Loss) Other Net Of Tax	(5,670,000)	1,115,000	(18,550,000)	(838,000)
Ending balance	(21,188,000)	1,371,000	(21,188,000)	1,371,000
Net unrealized loss on cash flow hedges
Accumulated Other Comprehensive Income [Line Items]
Beginning balance	256,000	(563,000)	(311,000)	(613,000)
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(380,000)	(74,000)	(635,000)	(301,000)
Reclassification Out Of Accumulated Other Comprehensive Income	517,000	108,000	1,339,000	385,000
Other Comprehensive Income (Loss) Other Net Of Tax	137,000	34,000	704,000	84,000
Ending balance	393,000	(529,000)	393,000	(529,000)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income [Line Items]
Beginning balance	(15,262,000)	(307,000)	(2,949,000)	1,596,000
Other Comprehensive Income Loss Before Reclassifications Net Of Tax	(5,987,000)	1,111,000	(18,996,000)	(1,027,000)
Reclassification Out Of Accumulated Other Comprehensive Income	454,000	38,000	1,150,000	273,000
Other Comprehensive Income (Loss) Other Net Of Tax	(5,533,000)	1,149,000	(17,846,000)	(754,000)
Ending balance	$ (20,795,000)	$ 842,000	$ (20,795,000)	$ 842,000