Loans (Schedule of Recorded Investment in Home Equity, Consumer and Residential Mortgage Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2017		Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	$ 2,098,726	[1]	$ 2,001,415	[2]
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	9,099		11,048
Home Equity Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	146,393	[1]	134,032	[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	146,255		133,959
Home Equity Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	138		73
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	63,816	[1]	60,099	[2]
Consumer Loans | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	0		53
Consumer Loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	63,452		60,014
Consumer Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	364		85
Residential Mortgage Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	179,931	[1]	183,770	[2]
Residential Mortgage Loans | Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	894		945
Residential Mortgage Loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	179,001		182,421
Residential Mortgage Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	$ 930		$ 1,349

[1] Total recorded investment in loans includes $9,013 in accrued interest.

[2] Total recorded investment in loans includes $8,011 in accrued interest.