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Accumulated Other Comprehensive Loss (Schedule of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Beginning balance			$ (21,465)
Balance			113,698	$ 120,771
Ending balance	$ (18,965)			(21,465)
Balance	120,838			113,698
Investment securities- with OTTI [Member]
Balance	(2,336)	$ (2,270)	(2,368)	(1,942)
Other comprehensive income/(loss) before reclassifications	245	(32)	100	(421)
Amounts reclassified from accumulated other comprehensive income	(33)	(34)	(2)	(5)
Balance	(2,124)	(2,336)	(2,270)	(2,368)
Investment Securities -All Other AFS [Member]
Balance	(1,432)	(3,140)	(3,218)	(2,024)
Other comprehensive income/(loss) before reclassifications	(51)	1,698	73	(929)
Amounts reclassified from accumulated other comprehensive income	12	10	5	(265)
Balance	(1,471)	(1,432)	(3,140)	(3,218)
Investment Securities HTM [Member]
Balance	(1,250)	(1,293)	(1,354)	(1,971)
Other comprehensive income/(loss) before reclassifications	0	0	0	0
Amounts reclassified from accumulated other comprehensive income	54	43	61	617
Balance	(1,196)	(1,250)	(1,293)	(1,354)
Cash Flow Hedge (OCI) [Member]
Balance	324	474	422	(39)
Other comprehensive income/(loss) before reclassifications	4	(150)	52	461
Amounts reclassified from accumulated other comprehensive income	0	0	0	0
Balance	328	324	474	422
Pension Plan [Member]
Balance	(14,036)	(14,038)	(14,232)	(12,663)
Other comprehensive income/(loss) before reclassifications	24	(158)	32	(2,086)
Amounts reclassified from accumulated other comprehensive income	160	160	162	517
Balance	(13,852)	(14,036)	(14,038)	(14,232)
SERP [Member]
Balance	(672)	(693)	(715)	(305)
Other comprehensive income/(loss) before reclassifications	0	0	0	(466)
Amounts reclassified from accumulated other comprehensive income	22	21	22	56
Balance	(650)	(672)	(693)	(715)
Accumulated Other Comprehensive Loss [Member]
Balance	(19,402)	(20,960)	(21,465)	(18,944)
Other comprehensive income/(loss) before reclassifications	222	1,358	257	(3,441)
Amounts reclassified from accumulated other comprehensive income	215	200	248	920
Balance	$ (18,965)	$ (19,402)	$ (20,960)	$ (21,465)

X

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e637-108580

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

+ References

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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