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Employee Benefit Plans Employee Benefit Plans 7 (Details) - Pension Benefits - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Employee benefit plans
Fair Value	$ 150,872	$ 142,174	$ 140,561
Unfunded Commitments	0	0
Cash equivalents
Employee benefit plans
Fair Value	500	469
Unfunded Commitments		0
Fixed income fund
Employee benefit plans
Fair Value	57,674	56,218
Unfunded Commitments		0
U.S. small/mid cap funds
Employee benefit plans
Fair Value	24,312	21,219
Unfunded Commitments		0
U.S. large cap funds
Employee benefit plans
Fair Value	46,175	42,395
Unfunded Commitments		0
International funds
Employee benefit plans
Fair Value	14,869	14,455
Unfunded Commitments		0
Total equity funds
Employee benefit plans
Fair Value	85,356	78,069
Unfunded Commitments	0	0
Real estate funds
Employee benefit plans
Fair Value	$ 7,342	7,418
Unfunded Commitments		$ 0

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+ References

No definition available.

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- Definition

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
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 6A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=SL6742756-110258

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