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Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Expense (Benefit) [Abstract]      
Current federal tax expense (benefit) $ (555) $ 325 $ 1,793
Deferred federal income tax expense (benefit) (94) (623) (497)
Federal income tax expense (benefit), continuing operations (649) (298) 1,296
Current state and local tax expense (benefit) 120 (2) 242
Deferred state and local income tax expense (benefit) 765 1,036 (52)
State and local income tax expense (benefit), continuing operations 885 1,034 190
Current foreign tax expense (benefit) 295 1,640 901
Deferred foreign income tax expense (benefit) (118) (1,092) (237)
Foreign income tax expense (benefit), continuing operations 177 548 664
Current income tax expense (benefit) (140) 1,963 2,936
Deferred income tax expense (benefit) 553 (679) (786)
Net income tax expense $ 413 $ 1,284 $ 2,150