Loans and Leases (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Individually Evaluated for Impairment	$ 119,593,000	$ 132,146,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Purchase Discount Remaining	61,200,000
Loans and Leases Receivable, Collateral for Secured Borrowings	2,200,000,000	1,380,000,000
Advances from Federal Home Loan Banks	240,300,000	240,300,000
Federal Home Loan Bank Advances, Current Borrowing Capacity	1,960,000,000	1,140,000,000
Noncovered loans pledged to secure debt obligations	3,160,000,000	2,560,000,000
Charge off of past due business credit card loans (days)	120 days
Loans and Leases Receivable, Gross, Carrying Amount, Covered	485,300,000	1,029,400,000
Sun American Bank
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	41,100,000
First Regional Bank
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	73,200,000
Williamsburg First National Bank
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount, Covered	9,100,000
Loans on the Cost Recovery Method
Financing Receivable, Recorded Investment [Line Items]
Carrying value of acquired impaired loans	$ 33,422,000	$ 28,493,000