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Income Taxes (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current:      
Federal $ 3,660 $ 4,374 $ 3,638
State and local 220 323 454
Foreign 16,806 15,229 20,744
Current income tax expense 20,686 19,926 24,836
Deferred:      
Federal 30 (84) 370
State and local 1 30 59
Foreign 810 (502) 4,415
Deferred income tax (benefit) 841 (556) 4,844
Total income tax expense $ 21,527 $ 19,370 $ 29,680