Pensions and Other Postretirement Benefit Plans (Reconciliation of Level 3 Assets) (Details) - Pension Plans [Member] - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	$ 183,199	$ 168,390
Fair value of plan assets, end of year	171,387	183,199
Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	9,019	10,301
Net realized gains/(losses)	53	44
Net unrealized gains/(losses)	240	665
Net purchases, issuances and settlements	$ (1,041)	$ (1,991)
Net transfers (out of) Level 3
Fair value of plan assets, end of year	$ 8,271	$ 9,019
Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	2,133
Fair value of plan assets, end of year	2,403	2,133
Insurance Contracts [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	$ 2,133	$ 2,875
Net realized gains/(losses)
Net unrealized gains/(losses)	$ 35	$ 49
Net purchases, issuances and settlements	$ 235	$ (791)
Net transfers (out of) Level 3
Fair value of plan assets, end of year	$ 2,403	$ 2,133
Limited Partnerships [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	6,522
Fair value of plan assets, end of year	5,676	6,522
Limited Partnerships [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	6,522	7,034
Net realized gains/(losses)	46	44
Net unrealized gains/(losses)	222	613
Net purchases, issuances and settlements	$ (1,114)	$ (1,169)
Net transfers (out of) Level 3
Fair value of plan assets, end of year	$ 5,676	$ 6,522
Hedge Funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	364
Fair value of plan assets, end of year	192	364
Hedge Funds [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, beginning of year	364	$ 392
Net realized gains/(losses)	7
Net unrealized gains/(losses)	(17)	$ 3
Net purchases, issuances and settlements	$ (162)	$ (31)
Net transfers (out of) Level 3
Fair value of plan assets, end of year	$ 192	$ 364

Actual return on plan assets, separately identifying the amount related to assets sold during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(02)(A)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(iv)(02)(A)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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- Definition

Actual return on plan assets, separately identifying the amount related to assets still held at the reporting date.

+ References

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No definition available.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=49178875&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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Amount of increase (decrease) in plan assets from purchases, sales and settlement of plan obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(02)(B)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 5
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- Definition

Transfers in and out of Level 3. For example, transfers due to changes in the observability of significant inputs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(02)(C)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

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