Loan Portfolio and Credit Quality Loan footnote text disclosures (Details) (USD $)	3 Months Ended	9 Months Ended
	Jun. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Deferred Income		$ (4,900,000)		$ (4,100,000)
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		483,000		65,000
Financing Receivable, Modifications, Recorded Investment		39,200,000		54,500,000
Transfer of Portfolio Loans and Leases to Held-for-sale	57,000,000	56,967,000	5,593,000
Gain on sale of portfolio loans, net	1,600,000
Accruing Troubled Debt Restructured Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Modifications, Recorded Investment		$ 24,600,000		$ 28,400,000