Long-Term Debt - Senior Unsecured Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Apr. 09, 2019	Feb. 22, 2017	Oct. 24, 2016
Long-Term Debt
Cash paid (excluding payments of accrued interest)	$ 83,167	$ 115,796	$ 454
Gain (loss) on early extinguishment of liabilities, net	$ 1,813	(16,692)	1,341
7.5% Senior Notes due 2023
Long-Term Debt
Face amount						$ 700,000
Fixed interest rate	7.50%					7.50%
Notes repurchased	$ 79,549	52,072	0
Cash paid (excluding payments of accrued interest)	77,847	33,566	0
Gain (loss) on early extinguishment of liabilities, net	1,318	18,096	0
Write off of debt issuance costs	$ 400	400
6.125% Senior Notes due 2025
Long-Term Debt
Face amount					$ 500,000
Fixed interest rate	6.125%				6.125%
Notes repurchased	$ 0	7,300	1,815
Cash paid (excluding payments of accrued interest)	0	3,647	454
Gain (loss) on early extinguishment of liabilities, net	$ 0	3,575	1,341
Write off of debt issuance costs		100	100
7.5% Senior Notes due 2026
Long-Term Debt
Face amount				$ 450,000
Fixed interest rate	7.50%			7.50%
Notes repurchased	$ 6,000	111,598	0
Cash paid (excluding payments of accrued interest)	5,320	78,583	0
Gain (loss) on early extinguishment of liabilities, net	610	31,463	$ 0
Write off of debt issuance costs	$ 100	$ 1,600