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Income Taxes (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]      
United States $ 30,795 $ 144,756 $ 177,244
Foreign 112,634 159,968 169,678
Income from continuing operations before income tax expense 143,429 304,724 346,922
Current      
U.S. federal 3,141 19,152 9,367
U.S. state and local (1,424) 2,663 630
Foreign 30,734 25,602 25,052
Total current 32,451 47,417 35,049
Deferred      
U.S. federal 8,138 20,521 10,696
U.S. state and local (3,042) 3,357 833
Foreign (228) 4,117 (7,851)
Total deferred 4,868 27,995 3,678
Total income tax expense 37,319 75,412 38,727
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense 30,506 29,719 17,201
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income tax expense at statutory rate 54,854 116,557 133,565
Benefit of pass through entity status 0 0 (41,644)
Taxes on foreign earnings at less than the U.S statutory rate (12,569) (31,468) (48,154)
Noncontrolling interest (2,991) (14,116) (6,869)
Other (1,975) 4,439 1,829
Total income tax expense 37,319 75,412 38,727
Undistributed earnings of certain foreign subsidiaries 500,000    
Unrecognized tax benefits 100 300  
Latin America      
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense 6,077 2,301 (4,171)
West Africa      
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense 8,413 11,247 8,789
Middle East      
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense 5,474 8,630 4,765
Europe      
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense 3,317 1,690 1,842
Asia Pacific      
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense 1,454 2,032 2,732
Other      
Foreign Income Tax Expense (Benefit) [Abstract]      
Total foreign income tax expense $ 5,771 $ 3,819 $ 3,244