Deferred Payment Obligation (Details) - USD ($) $ in Thousands				3 Months Ended		9 Months Ended
	Dec. 18, 2019	Dec. 11, 2009	Jul. 31, 2008	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Other Liabilities Disclosure [Abstract]
Deferred payment obligation, original amount			$ 158,000
Deferred payment obligation, original term			8 years 6 months
Required payment on DPO	$ 80,000	$ 78,000	$ 78,000
Payment of deferred payment obligation	83,000	100,400				$ 80,000	$ 0
Deferred payment on obligation interest	$ 3,000	$ 22,400		$ 1,718	$ 2,000	5,740	$ 6,015
Deferred payment obligation				$ 80,000		$ 80,000