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Expected Future Benefit Payments (Details) - UNITED KINGDOM
$ in Thousands
Dec. 31, 2015
USD ($)
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]  
2016 $ 941
2017 1,043
2018 868
2019 1,244
2020 1,428
2021-2025 8,135
Total $ 13,659