Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Revenue Allowance, Activity
Reserve balance at the beginning of the year	$ 13,564	$ 15,249	$ 13,735
Actual credits issued related to sales recorded in prior fiscal years	(12,884)	(14,639)	(12,440)
Reserves or (reversals) charged during current fiscal year related to sales in prior fiscal years	168	381	(401)
Reserves charged to net sales during current fiscal year related to sales in current fiscal year	96,268	80,491	70,647
Actual credits issued related to sales recorded in Fiscal 2012	(80,077)	(67,918)	(56,292)
Reserve balance at the end of the year	17,039	13,564	15,249
Minimum
Revenue Allowance, Activity
Shelf-life of products	24 months
Maximum
Revenue Allowance, Activity
Shelf-life of products	36 months
Morphine Sulfate
Revenue Allowance, Activity
Actual credits issued related to sales recorded in prior fiscal years		(2,382)
Chargebacks
Revenue Allowance, Activity
Reserve balance at the beginning of the year	5,497	6,282	6,090
Actual credits issued related to sales recorded in prior fiscal years	(5,354)	(6,100)	(6,069)
Reserves or (reversals) charged during current fiscal year related to sales in prior fiscal years	(143)
Reserves charged to net sales during current fiscal year related to sales in current fiscal year	68,576	53,687	48,539
Actual credits issued related to sales recorded in Fiscal 2012	(61,513)	(48,372)	(42,278)
Reserve balance at the end of the year	7,063	5,497	6,282
Rebates
Revenue Allowance, Activity
Reserve balance at the beginning of the year	2,925	3,566	2,538
Actual credits issued related to sales recorded in prior fiscal years	(3,084)	(3,947)	(2,538)
Reserves or (reversals) charged during current fiscal year related to sales in prior fiscal years	159	381
Reserves charged to net sales during current fiscal year related to sales in current fiscal year	21,019	16,587	16,353
Actual credits issued related to sales recorded in Fiscal 2012	(16,583)	(13,662)	(12,787)
Reserve balance at the end of the year	4,436	2,925	3,566
Returns
Revenue Allowance, Activity
Reserve balance at the beginning of the year	5,142	5,401	5,107
Actual credits issued related to sales recorded in prior fiscal years	(4,294)	(4,592)	(3,833)
Reserves or (reversals) charged during current fiscal year related to sales in prior fiscal years			(401)
Reserves charged to net sales during current fiscal year related to sales in current fiscal year	4,692	6,715	4,528
Actual credits issued related to sales recorded in Fiscal 2012		(2,382)
Reserve balance at the end of the year	5,540	5,142	5,401
Other
Revenue Allowance, Activity
Actual credits issued related to sales recorded in prior fiscal years	(152)
Reserves or (reversals) charged during current fiscal year related to sales in prior fiscal years	152
Reserves charged to net sales during current fiscal year related to sales in current fiscal year	1,981	3,502	1,227
Actual credits issued related to sales recorded in Fiscal 2012	$ (1,981)	$ (3,502)	$ (1,227)