Loans (Risk Category Of Loans (Excluding PCI Loans)) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 3,614,660	$ 3,574,089
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	3,379,006	3,350,475
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	86,433	82,612
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	149,221	141,002
Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	384,763	411,003
Construction [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	312,747	329,848
Construction [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	41,337	42,845
Construction [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	30,679	38,114
Construction [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans		196
Total [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,861,558	5,863,479
Total [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,377,417	5,350,266
Total [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	198,610	221,183
Total [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	284,942	291,302
Total [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	589	728
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,862,135	1,878,387
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,685,664	1,669,943
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	70,840	95,726
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	105,042	112,186
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 589	$ 532