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Securities - Held-To-Maturity Securities Held By the Company (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 139,968	$ 142,119
Gross Unrealized Gains	2,084	999
Gross Unrealized Losses	45	286
Fair Value	142,007	142,832
Obligations of U.S. Government sponsored entities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	131,805	132,098
Gross Unrealized Gains	1,941	804
Gross Unrealized Losses	41	283
Fair Value	133,705	132,619
Obligations of U.S. states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	8,163	10,021
Gross Unrealized Gains	143	195
Gross Unrealized Losses	4	3
Fair Value	$ 8,302	$ 10,213

X

- Definition

Amount of accumulated unrealized gain on 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 (b)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

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+ 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 (c)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

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+ 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=73527792&loc=d3e27232-111563

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-Name Accounting Standards Codification
-Topic 320
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-Section 50
-Paragraph 5
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-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

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