Loans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 contract loan	Dec. 31, 2013 contract loan	Dec. 31, 2012 contract
Financing Receivable, Recorded Investment [Line Items]
Loans to related parties	$ 13,200,000	$ 14,200,000
Loans and Leases Receivable, Related Parties, Additions	5,700,000
Repayments on related party loans	6,700,000
Commercial and residential real estate loans pledged as FHLB collateral	1,083,879,000	1,075,389,000
Federal Reserve Bank, Advances, Collateral Pledged	86,130,000	85,452,000
Financing Receivable, Recorded Investment, Nonaccrual Status	31,352,000
Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans	2,200,000	2,900,000	3,400,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans	1,400,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing, Number of Loans		0
Loans and Leases Receivable, Nonaccrual of Interest, Commitments of Additional Funds	349,000	28,000
Financing Receivable Modifications Additional Commitment To Lend	0	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	0	0
Loans Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Commercial and residential real estate loans pledged as FHLB collateral	$ 1,083,879,000	$ 1,075,389,000