Loans (Recorded Investment In PCI Loans By Class Based On Individual Loan Payment Activity) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 2,511,963	$ 2,285,590
Performing Loans [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	2,479,672	2,253,944
Non-Performing Loans [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	32,291	31,646
PCI Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,411,883	271,844
PCI Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	379,000	83,742
PCI Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	887,404	160,651
PCI Loans [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	53,906	6,974
PCI Loans [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	33,841	15,546
PCI Loans [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	57,732	4,931
PCI Loans [Member] | Performing Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	1,330,743	195,143
PCI Loans [Member] | Performing Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	364,520	67,424
PCI Loans [Member] | Performing Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	840,652	112,047
PCI Loans [Member] | Performing Loans [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	40,553	623
PCI Loans [Member] | Performing Loans [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	28,115	10,118
PCI Loans [Member] | Performing Loans [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	56,903	4,931
PCI Loans [Member] | Non-Performing Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	81,140	76,701
PCI Loans [Member] | Non-Performing Loans [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	14,480	16,318
PCI Loans [Member] | Non-Performing Loans [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	46,752	48,604
PCI Loans [Member] | Non-Performing Loans [Member] | Construction [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	13,353	6,351
PCI Loans [Member] | Non-Performing Loans [Member] | Residential Mortgage [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	5,726	5,428
PCI Loans [Member] | Non-Performing Loans [Member] | Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans	$ 829