Allowance for Noncovered Loan and Lease Losses and Unfunded Commitments and Letters of Credit (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ 1,922	$ (20)
Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of unallocated loan amount	5.00%
Noncovered Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses	$ (500)	$ (1,000)