Allowance For Non-Covered Loan Loss And Credit Quality (Summary Of Reserve For Unfunded Commitments Activity) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	$ 1,126	$ 988	$ 940	$ 818
Net change to other expense	1,631	(17)	1,817	153
Balance, end of period	2,757	971	2,757	971
Unfunded loan commitments	1,351,165	974,439	1,351,165	974,439
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	107	61	59	33
Net change to other expense	18	1	66	29
Balance, end of period	125	62	125	62
Unfunded loan commitments	139,479	60,906	139,479	60,906
Commercial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	790	705	633	575
Net change to other expense	1,607	(36)	1,764	94
Balance, end of period	2,397	669	2,397	669
Unfunded loan commitments	900,875	640,028	900,875	640,028
Residential [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	162	169	185	158
Net change to other expense	2	10	(21)	21
Balance, end of period	164	179	164	179
Unfunded loan commitments	255,499	227,505	255,499	227,505
Consumer & Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance, beginning of period	67	53	63	52
Net change to other expense	4	8	8	9
Balance, end of period	71	61	71	61
Unfunded loan commitments	$ 55,312	$ 46,000	$ 55,312	$ 46,000