Employees' Benefit Plans (Details)	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan, Funded Percentage	91.47%	94.17%

Plan assets of a defined benefit plan, as a percentage of projected benefit obligation.

No definition available.

Name:	us-gaap_DefinedBenefitPlanFundedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant