Weighted Average FICO Scores & weighted Average Combined LTV Ratios (Details) - score	Dec. 31, 2016	Dec. 31, 2015
Residential Portfolio Segment [Member]
Weighted average FICO scores and the weighted average combined LTV Ratio
FICO score (re-scored)	743	742
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	63.20%	61.40%
Home Equity [Member]
Weighted average FICO scores and the weighted average combined LTV Ratio
FICO score (re-scored)	767	765
Financing Receivable With Credit Quality Of Loan Based Upon the Weighted Average Loan-To-Value Ratio	55.90%	55.80%