Loans and Leases (Loans Acquired By Loan Class) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	$ 1,109,933	$ 1,029,426
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	788,117	781,307
Commercial | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	80,827	78,915
Commercial | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	637,481	642,891
Commercial | Other commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	34,688	41,381
Commercial | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	33,851	17,254
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	1,270	866
Noncommerical
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	321,816	248,119
Noncommerical | Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	270,688	213,851
Noncommerical | Revolving mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	20,129	30,834
Noncommerical | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	28,759	2,583
Noncommerical | Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Acquired	$ 2,240	$ 851