Loans (Schedule of Recorded Investment in Home Equity, Consumer and Residential Mortgage Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2018		Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	$ 2,163,545	[1]	$ 2,154,502	[2]
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	8,819		9,117
Home Equity Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	152,527	[1]	152,757	[2]
Home Equity Loans | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	0		0
Home Equity Loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	152,339		152,558
Home Equity Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	188		199
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	64,655	[1]	67,647	[2]
Consumer Loans | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	0		0
Consumer Loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	64,584		67,361
Consumer Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	71		286
Residential Mortgage Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	178,537	[1]	179,199	[2]
Residential Mortgage Loans | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	878		888
Residential Mortgage Loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	177,621		178,712
Residential Mortgage Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	$ 916		$ 487

[1] Total recorded investment in loans includes $9,697 in accrued interest.

[2] Total recorded investment in loans includes $9,483 in accrued interest.