Income Taxes - Narratives (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Taxes receivable		$ 6,100
Operating loss carryforwards	$ 94,700
Deferred tax assets, operating loss carryforwards, subject to expiration	46,400
Deferred tax assets, operating loss carryforwards, not subject to expiration	48,300
Valuation allowance	48,671		$ 20,341
Unremitted earnings outside the US	$ 5,700