Loans (Schedule of Recorded Investment in Home Equity, Consumer and Residential Mortgage Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	$ 3,095,902	[1]	$ 2,744,042	[2]
Home Equity Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	226,775	[1]	209,009	[2]
Consumer Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	81,429	[1]	77,761	[2]
Residential Mortgage Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	305,560	[1]	329,354	[2]
Performing | Home Equity Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	226,695		208,921
Performing | Consumer Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	81,314		77,599
Performing | Residential Mortgage Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	303,065		327,737
Nonperforming | Home Equity Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	80		88
Nonperforming | Consumer Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	115		162
Nonperforming | Residential Mortgage Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	2,495		1,617
Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	12,798		11,556		$ 9,117
Loans Acquired with Deteriorated Credit Quality | Home Equity Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	369		365		0
Loans Acquired with Deteriorated Credit Quality | Consumer Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	0		0		0
Loans Acquired with Deteriorated Credit Quality | Residential Mortgage Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans, net of deferred income	$ 688		$ 1,283		$ 888

[1] Total recorded investment in loans includes $13,929 in accrued interest.

[2] Total recorded investment in loans includes $12,301 in accrued interest.