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Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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