Allowance For Non-Covered Loan Loss And Credit Quality (Summary Of Reserve For Unfunded Commitments Activity) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Balance, beginning of period	$ 818	$ 731
Net change to other expense	122	87
Balance, end of period	940	818
Unfunded commitments	944,581	838,376
Commercial [Member]
Balance, beginning of period	575	484
Net change to other expense	58	91
Balance, end of period	633	575
Unfunded commitments	605,001	548,920
Consumer & Other [Member]
Balance, beginning of period	52	46
Net change to other expense	11	6
Balance, end of period	63	52
Unfunded commitments	47,577	45,556
Commercial Real Estate [Member]
Balance, beginning of period	33	57
Net change to other expense	26	(24)
Balance, end of period	59	33
Unfunded commitments	58,013	33,326
Residential [Member]
Balance, beginning of period	158	144
Net change to other expense	27	14
Balance, end of period	185	158
Unfunded commitments	$ 233,990	$ 210,574