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This item represents a periodic decrease to the plan obligations and a decrease to plan assets.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":31000,"accn":"0001193125-13-112579","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":172000,"accn":"0001193125-13-112579","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18"},{"start":"2012-01-01","end":"2012-12-31","val":-172000,"accn":"0001437749-14-004402","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-18","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-181000,"accn":"0001437749-14-004402","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-18"},{"start":"2013-01-01","end":"2013-12-31","val":-181000,"accn":"0001437749-15-005165","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-16","frame":"CY2013"},{"start":"2014-01-01","end":"2014-12-31","val":-152000,"accn":"0001437749-15-005165","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-16"},{"start":"2014-01-01","end":"2014-12-31","val":152000,"accn":"0001437749-16-027709","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2014"},{"start":"2015-01-01","end":"2015-12-31","val":96000,"accn":"0001437749-16-027709","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15"},{"start":"2015-01-01","end":"2015-12-31","val":96000,"accn":"0001437749-17-004713","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2015"},{"start":"2016-01-01","end":"2016-12-31","val":55000,"accn":"0001437749-17-004713","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016"}]}},"DefinedBenefitPlanContributionsByEmployer":{"label":"Defined Benefit Plan, Plan Assets, Contributions by Employer","description":"Amount of contribution received by defined benefit plan from employer which increases plan assets.","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":147000,"accn":"0001193125-13-112579","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18","frame":"CY2011"},{"start":"2012-01-01","end":"2012-12-31","val":28000,"accn":"0001437749-14-004402","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-18","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":28000,"accn":"0001193125-13-112579","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18"}]}},"DefinedBenefitPlanContributionsByPlanParticipants":{"label":"Defined Benefit Plan, Contributions by Plan Participants (Deprecated 2017-01-31)","description":"The amount of contributions made by plan participants. 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