Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Expense (Benefit)	$ 50			$ (1,151)	$ 1,574	$ (2,275)
Effective tax rate from continuing operations (as a percent)					0.90%
Deferred expenses relating to valuation allowance			$ 1,600
Deferred expenses relating to valuation allowance (as a percent)			1.00%
Unrecognized tax benefits	$ 100				$ 100
NORWAY
Deferred benefit relating to net operating losses		$ 200			100
Deferred benefit relating to net operating losses ( as a percent)		0.20%
NORWAY | Minimum
Income Tax Expense (Benefit)		$ 100			$ 100
Effective tax rate from continuing operations (as a percent)		0.10%