Investment Securities (Held-to-maturity Securities by Maturities) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$ 0
Debt securities, maturing 1 to 5 years, amortized cost	320
Debt securities, maturing 5 to 10 years, amortized cost	5,615
Debt securities, maturing over 10 years, amortized cost	37,727
Amortized Cost	43,662	$ 45,728
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	328
Debt securities, maturing 5 to 10 years, fair value	5,947
Debt securities, maturing over 10 years, fair value	38,870
Fair Value	$ 45,145	45,853
Held-to-maturity securities, maturing within 1 year, average yield	0.00%
Held-to-maturity securities, maturing 1 to 5 years, average yield	3.14%
Held-to-maturity securities, maturing 6 to 10 years, average yield	2.24%
Held-to-maturity securities, maturing over 10 years, average yield	2.86%
Held-to-maturity securities, total average yield	2.78%
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	$ 0
Debt securities, maturing 1 to 5 years, amortized cost	320
Debt securities, maturing 5 to 10 years, amortized cost	977
Debt securities, maturing over 10 years, amortized cost	2,526
Amortized Cost	3,823	3,831
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	328
Debt securities, maturing 5 to 10 years, fair value	1,123
Debt securities, maturing over 10 years, fair value	2,834
Fair Value	4,285	4,221
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	4,638
Debt securities, maturing over 10 years, amortized cost	29,565
Amortized Cost	34,203	35,367
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	4,824
Debt securities, maturing over 10 years, fair value	30,381
Fair Value	35,205	35,196
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, maturing within 1 year, amortized cost	0
Debt securities, maturing 1 to 5 years, amortized cost	0
Debt securities, maturing 5 to 10 years, amortized cost	0
Debt securities, maturing over 10 years, amortized cost	5,636
Amortized Cost	5,636	6,530
Debt securities, maturing within 1 year, fair value	0
Debt securities, maturing 1 to 5 years, fair value	0
Debt securities, maturing 5 to 10 years, fair value	0
Debt securities, maturing over 10 years, fair value	5,655
Fair Value	$ 5,655	$ 6,436

Held-to-maturity Securities, Debt Maturities, Average Yield

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Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost before Other than Temporary Impairment

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Held-to-maturity Securities, Debt Maturities, Next Rolling Twelve Months, Average Yield

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Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Amortized Cost before Other than Temporary Impairment

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Held-to-maturity Securities, Debt Maturities, Rolling after Ten Years, Average Yield

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Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Amortized Cost before Other than Temporary Impairment

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Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Average Yield

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Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Amortized Cost before Other than Temporary Impairment

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Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Average Yield

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Amount before other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of held-to-maturity debt securities maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of held-to-maturity debt securities maturing after the tenth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of held-to-maturity debt securities maturing in the sixth through tenth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of held-to-maturity debt securities maturing in the second through fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of investments in debt securities classified as held-to-maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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