Income Taxes (Components Of Income Tax Expense Recorded Directly To Stockholders Equity) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Unrealized gain (loss) on securities available for sale	$ (13,952)	$ (19,634)	$ 36,525
Compensation expense for tax purposes in excess of amounts recognized for financial reporting purposes	778	1,478	(4,433)
Accumulated pension (benefit) loss	(3,390)	(2,132)	(1,850)
Income tax expense (benefit) allocated to stockholders’ equity	$ (16,564)	$ (20,288)	$ 30,242