Income Taxes (Schedule Of Historic Tax Credit) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Contingency [Line Items]
Loss on tax credit investment			$ (2,257)	$ (2,139)
Refundable state historic tax credit	$ 972		1,619	1,508
Income tax benefit	(740)	$ (471)	(3,002)	(1,725)
Historic Structure In New York State [Member]
Income Tax Contingency [Line Items]
Loss on tax credit investment	(1,338)		(2,257)	(2,139)
Refundable state historic tax credit	972		1,619	1,508
Income tax benefit	660	380	896	757
Total HTC income	$ 294	$ 380	$ 258	$ 126