Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Taxes
Tax benefit on goodwill impairment			$ 22,600
Goodwill impairment	$ 99,800	$ 0	99,830	$ 0
Potential decrease in unrecognized tax benefit			$ 2,700

Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible impairment loss.

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