Income Taxes - Expense (Details) - USD ($) $ in Thousands			3 Months Ended												12 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Current Income Tax Expense (Benefit)
Federal															$ (7,082)	$ 13,185	$ (9,439)
State and Local															405	(81)	1,152
Total Current Income Tax Expense (Benefit)															(6,677)	13,104	(8,287)
Deferred Income Tax Expense (Benefit)
Federal															(6,525)	(85,022)	31,263
State and Local															(2,060)	(2,220)	(573)
Total Deferred Income Tax Expense (Benefit)															(8,585)	(87,242)	30,690
Total Income Tax Expense (Benefit)			$ (10,077)	$ (1,664)	$ (5,308)	$ 1,787	$ (2,544)	$ 1,359	$ 2,647	$ (75,600)	$ (883)	$ (2,275)	$ 18,138	$ 7,423	$ (15,262)	$ (74,138)	$ 22,403
Reconciliation of federal statutory rate to effective rate
Federal income tax at statutory rate (as a percent)	21.00%	35.00%													21.00%	21.00%	28.10%
State and local income tax, net (as a percent)															2.70%	0.50%	0.60%
Nondeductible expenses (as a percent)															(1.10%)	(0.10%)	0.20%
Nondeductible drug fee															(1.60%)
Foreign rate differential (as a percent)															(0.10%)	(0.40%)	0.40%
Income tax credits (as a percent)															2.50%	0.50%	(1.40%)
Domestic production activity deduction (as a percent)																	(1.50%)
Unrecognized tax benefits															(5.00%)	0.10%	(6.70%)
Change in tax laws (as a percent)															15.40%		25.60%
Excess tax benefits on share-based compensation (as a percent)															(0.80%)	(0.30%)	(0.30%)
Other (as a percent)															(1.60%)	0.10%	(1.20%)
Effective income tax rate (as a percent)															31.40%	21.40%	43.80%
COVID 19 [Member]
Deferred Income Tax Expense (Benefit)
Total Income Tax Expense (Benefit)															$ (2,800)