Loans Receivable and Credit Quality Troubled Debt Restructured Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) Loans		Dec. 31, 2014 USD ($) Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	11		7
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 6,661		$ 10,258
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 6,658		$ 9,367
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	1		4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3,701		$ 663
Commercial Loan [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1		0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 1,298		$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,304		$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Loan [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1	[1]	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 1,304	[1]	$ 0
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	2		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 4,850		$ 189
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 4,838		$ 189
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	1		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 3,701		$ 0
Commercial Real Estate Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1		1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 4,118		$ 189
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Commercial Real Estate Portfolio Segment [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1	[1]	0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 720	[1]	$ 0
Construction Loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		2
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0		$ 8,782
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 7,882
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Construction Loans [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		2
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 7,882
Construction Loans [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Construction Loans [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Construction Loans [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Residential Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	8		3
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 513		$ 287
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 516		$ 296
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		4
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 663
Residential Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	7		3
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 491		$ 296
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	1		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 25		$ 0
Residential Portfolio Segment [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0		$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Home Equity Line of Credit [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		1
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0		$ 1,000
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 1,000
Financing Receivable, Modifications, Subsequent Default, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member] | Extended Maturity [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		1
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 1,000
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member] | Payment Deferral [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0
Consumer Portfolio Segment [Member] | Combination of Concessions [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts | Loans	0		0
Financing Receivable, Modifications, Post-Modification Recorded Investment	$ 0		$ 0

[1] Combination of concessions includes loans that have had more than one modification, including extension of term, temporary reduction of interest rate, and/or payment deferral.