Fair Value Of Assets And Liabilities (Changes In Fair Value Of Assets And Liabilities Which Fair Value Option Included In Current Period Earnings) (Details) (Mortgage Banking Noninterest Income [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Loans Held For Sale [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ 175	$ 872
Other Short Term Borrowings [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Changes in fair value included in net income	$ 172	$ (240)