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Goodwill And Other Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill And Net Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Goodwill [Roll Forward]
Amortization	$ (557)	$ (684)
Goodwill [Member]
Goodwill [Roll Forward]
Balance, beginning	125,585
Origination of Mortgage Servicing Rights (MSRs)	0
Amortization	0
Impairment reversal	0
Balance, ending	125,585
Core Deposit Premium [Member]
Goodwill [Roll Forward]
Balance, beginning	4,828
Origination of Mortgage Servicing Rights (MSRs)	0
Amortization	(461)
Impairment reversal	0
Balance, ending	4,367
Mortgage Servicing Rights [Member]
Goodwill [Roll Forward]
Balance, beginning	472
Origination of Mortgage Servicing Rights (MSRs)	70
Amortization	(96)
Impairment reversal	57
Balance, ending	$ 503

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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