Employee Benefit Plan - Asset Allocation of UK Plan (Details) - U.K. Pension Plan	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actual plan assets allocation (in hundredths)	33.00%	55.00%	60.00%
Fixed income debt securities, cash and other
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Actual plan assets allocation (in hundredths)	67.00%	45.00%	40.00%