Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Tax Expense (Benefit) [Abstract]
Current federal tax expense (benefit)	$ (196)	$ (3)
Deferred federal income tax expense (benefit)	(4,741)	(12)
Federal income tax expense (benefit), continuing operations	(4,937)	(15)
Current state and local tax expense (benefit)	(28)	(59)
Deferred state and local income tax expense (benefit)	(29)	(4)
State and local income tax expense (benefit), continuing operations	(57)	(63)
Current foreign tax expense (benefit)	1,143	596
Deferred foreign income tax expense (benefit)	(152)	(172)
Foreign income tax expense (benefit), continuing operations	991	424
Current income tax expense (benefit)	919	534
Deferred income tax expense (benefit)	(4,922)	(188)
Income tax (benefit) expense	$ (4,003)	$ 346