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Loans Receivable and Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 1,405		$ 1,405		$ 2,624
Impaired Financing Receivable, Recorded Investment	1,405		1,405		2,624
Unpaid Principal Balance, With no related allowance recorded	2,291		2,291		3,455
Unpaid Principal Balance, Total	2,291		2,291		3,455
Associated Allowance	0		0		0
Average Recorded Investment, Total	1,446	$ 3,832	1,488	$ 3,621
Interest Income Recognized, Total	12	34	41	93
Residential Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	23		23		23
Impaired Financing Receivable, Recorded Investment	23		23		23
Unpaid Principal Balance, With no related allowance recorded	28		28		28
Unpaid Principal Balance, Total	28		28		28
Associated Allowance	0		0		0
Average Recorded Investment, Total	23	579	23	372
Interest Income Recognized, Total	0	1		3
Commercial Real Estate Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,382		1,382		2,601
Impaired Financing Receivable, Recorded Investment	1,382		1,382		2,601
Unpaid Principal Balance, With no related allowance recorded	2,263		2,263		3,427
Unpaid Principal Balance, Total	2,263		2,263		3,427
Associated Allowance	0		0		$ 0
Average Recorded Investment, Total	1,423	3,253	1,465	3,249
Interest Income Recognized, Total	$ 12	$ 33	$ 41	$ 90

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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-Publisher FASB
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Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=66008989&loc=d3e5212-111524

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-Section 50
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-Publisher FASB
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