Loans, Allowance for Loan Losses and Credit Quality (Weighted Average FICO Scores and the Weighted Average Combined LTV Ratio) (Details) - score		Jun. 30, 2019	Dec. 31, 2018
Residential Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable With Quality Of Loan Based On Weighted Average Fico Rating	[1]	749	749
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	[2]	62.10%	58.60%
Consumer Home Equity [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable With Quality Of Loan Based On Weighted Average Fico Rating	[1]	767	767
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	[2],[3]	47.90%	49.30%

[1] (1) The average FICO scores at June 30, 2019 are based upon rescores available from June 2019 or origination data for loans booked from April through June 2019.  The average FICO scores at December 31, 2018 are based upon rescores available from November 2018 and origination score data for loans booked in December 2018.

[2] (2) The combined LTV ratios for June 30, 2019 are based upon updated automated valuations as of April 2019, when available, or the most current valuation data available.  The combined LTV ratios for December 31, 2018 are based upon updated automated valuations as of November 2018, when available, and/or the most current valuation data available.  The updated automated valuations provide new information on loans that may be available since the previous valuation was obtained.  If no new information is available, the valuation will default to the previously obtained data or most recent appraisal.

[3] (3) For home equity loans and lines in a subordinate lien, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.