Loans (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans and Leases Receivable, Deferred Income	$ 10,300		$ 10,300		$ 9,400
Troubled Debt Restructuring, Classification removed		$ 900	0	$ 2,500
Partial Charge-Offs On Impaired Loans			29,984		32,480
Impaired Financing Receivable, Related Allowance	5,738		5,738		3,660
Recorded investment, related to loans	26,900		26,900		9,300
Troubled Debt Restructuring Included In Nonaccrual Loans	41,900		41,900		47,500
TDRs included in accruing loan totals	17,200		17,200		16,300
Nonaccrual Trouble Debt Restructuring Current	19,000		19,000		15,700
Commitments to lend additional funds to borrowers whose terms had been modified in a TDR	3,300		3,300		1,400
Specific reserves related to troubled debt restructuring	3,300		3,300		2,400
Additional Specific Reserves Related To Troubled Debt Restructuring	212	258	1,200	537
Modified substandard commercial loans, total recorded investment	245	443	245	443
Modified substandard consumer loans, total recorded investment	12,800	17,600	12,800	17,600
Loan Modifications on Nonacrrual status	160	200	$ 1,000	1,000
Loan past due period before entering default status			30 days
Financing Receivable, Modifications, Subsequent Default, Recorded Investment, During Period	2,664	2,228	$ 2,710	2,507
Deposit Liabilities Reclassified as Loans Receivable	1,700		1,700		2,300
Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Partial Charge-Offs On Impaired Loans			25,700		32,400
Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Partial Charge-Offs On Impaired Loans			4,300		0
Commercial Real Estate [Member] | Financing Receivable With No Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	0		0		0
Commercial Real Estate [Member] | Financing Receivable With A Related Allowance Recorded [Member]
Financing Receivable, Recorded Investment [Line Items]
Impaired Financing Receivable, Related Allowance	488		488		$ 262
Accruing [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans modified during period	61	160	61	261
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans modified during period	$ 2,600	$ 2,100	$ 2,600	$ 2,200