Employee Benefit Plans (Details 5) $ in Thousands	Dec. 31, 2017 USD ($)
Pension Benefits
Combined benefits expected to be paid for all Company defined benefit plans
2018	$ 1,232
2019	1,316
2020	1,255
2021	1,168
2022	311
2023-2027	957
Expected Postretirement Benefit Payout
Combined benefits expected to be paid for all Company defined benefit plans
2018	1,098
2019	1,125
2020	1,146
2021	1,173
2022	1,204
2023-2027	$ 6,262

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

+ 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 (f)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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