Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Taxes
Income tax (expense) benefit	$ 3,769	$ 733	$ (5,689)	$ (4,911)
Actual effective tax rate	(2.70%)	2.50%	(3.00%)	(6.70%)
Statutory tax rate			21.00%	21.00%
Increase (decrease) in valuation allowance			$ 28,800

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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