Goodwill and Intangible Assets, Net - Impairment Testing (Details) $ / shares in Units, $ in Thousands		3 Months Ended				6 Months Ended	12 Months Ended
	Oct. 31, 2019 unit $ / shares	Mar. 31, 2020 USD ($) unit	Mar. 31, 2020 USD ($)	Mar. 31, 2020 USD ($) reporting_unit	Mar. 31, 2019 USD ($)	Oct. 31, 2019 $ / shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Number of reporting units for goodwill testing	3	4		4
Share price (in dollars per share) | $ / shares	$ 6.59					$ 6.59
Goodwill, impairment testing, percentage share price decrease						43.50%
Number of reporting units, fair value in excess of carrying amount | unit	1
Goodwill impairment			$ 47,133		$ 0
Goodwill		$ 569,797	569,797	$ 569,797	$ 770,334		$ 572,064	$ 768,124
Valuation, Income Approach
Finite-Lived Intangible Assets [Line Items]
Goodwill impairment							$ 199,800
Goodwill		$ 431,700	$ 431,700	$ 431,700