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2417403 - Disclosure - Employee benefit plans - Benefit Obligations (Details)
(http://www.forterrabp.com/role/EmployeeBenefitPlansBenefitObligationsDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001678463 (http://www.sec.gov/CIK)
Legal Entity [Axis]Forterra Building Products
Scenario [Axis]Predecessor
Geographical [Axis]Canada
Defined Benefit Plan Disclosure [Line Items]Period [Axis]
2014-01-01 - 2014-12-31
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Pension BenefitsOther Postretirement BenefitsDefined Benefit Plan and Other Postretirement Benefit Plan [Domain]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
 
 
 
Benefit obligation at January 1, 2014
42,067,000  
8,880,000  
50,947,000  
Service cost
829,000  
50,000  
879,000  
Interest cost
1,867,000  
395,000  
2,262,000  
Employee contributions
66,000  
0  
66,000  
Actuarial losses, net
5,482,000  
1,071,000  
6,553,000  
Gross benefits paid
(2,811,000) 
(304,000) 
(3,115,000) 
Exchange rate changes
(3,922,000) 
(831,000) 
(4,753,000) 
Benefit obligation at December 31, 2014
43,578,000  
 
9,261,000  
 
52,839,000