Loans (Schedule of Recorded Investment in Home Equity, Consumer and Residential Mortgage Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2018		Dec. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	$ 2,351,277	[1]	$ 2,154,502	[2]
Loans Acquired With Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	7,599		9,117
Home Equity Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	175,800	[1]	152,757	[2]
Home Equity Loans | Loans 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	175,741		152,558
Home Equity Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	59		199
Consumer Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	73,050	[1]	67,647	[2]
Consumer Loans | Loans 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	72,901		67,361
Consumer Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	149		286
Residential Mortgage Loans
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	220,434	[1]	179,199	[2]
Residential Mortgage Loans | Loans Acquired With Deteriorated Credit Quality
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	860		888
Residential Mortgage Loans | Performing
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	219,832		178,712
Residential Mortgage Loans | Nonperforming
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred income	$ 602		$ 487

[1] Total recorded investment in loans includes $11,104 in accrued interest.

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