Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Chargebacks
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 22,715	$ 32,167	$ 10,986
Acquisitions	23,526
Current year provision	431,606	247,186	208,965
Credits issued during the year	(417,928)	(256,638)	(187,784)
Balance at end of year	59,919	22,715	32,167
Returns
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	22,828	30,692	20,249
Acquisitions	1,496
Current year provision	19,666	7,618	21,403
Credits issued during the year	(11,631)	(15,482)	(10,960)
Balance at end of year	32,359	22,828	30,692
Government Reimbursed Rebates
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	1,312	938	1,005
Acquisitions	4,500
Current year provision	7,694	5,124	4,259
Credits issued during the year	(4,642)	(4,750)	(4,326)
Balance at end of year	8,864	1,312	938
Other Rebates
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	7,202	4,335	3,630
Acquisitions	28,944
Current year provision	162,023	90,915	36,923
Credits issued during the year	(158,836)	(88,048)	(36,218)
Balance at end of year	39,333	7,202	4,335
Sales Discounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	2,423	2,682	690
Acquisitions	2,360
Current year provision	20,129	10,267	9,381
Credits issued during the year	(18,875)	(10,526)	(7,389)
Balance at end of year	$ 6,037	$ 2,423	$ 2,682