Borrowings (Schedule of Other Borrowed Funds) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Advances from Federal Home Loan Banks	$ 56,112	$ 56,404
Total short-term borrowings	398,932	192,681	247,928
Total long-term borrowings	31,126	67,259
Borrowed Funds	430,058	259,940
Short-term Debt [Member]
Debt Instrument [Line Items]
Securities Sold under Agreements to Repurchase	130,047	151,035
Federal Home Loan Bank, Advances, Short-term	230,000	0
FHLBB and Correspondent Bank Overnight Borrowings	38,800	41,500
Capital Lease Obligations, Current	60	57
Notes Payable, Current	25	89
Long-term Debt [Member]
Debt Instrument [Line Items]
Securities Sold under Agreements to Repurchase	30,142	66,187
Capital Lease Obligations, Noncurrent	984	1,044
Notes Payable, Noncurrent	$ 0	$ 28