Accounting Policies (Details 3) (USD $) In Thousands	3 Months Ended
	Jun. 30, 2011
Activity related to product revenues allowances and reserve categories
Provision related to second quarter of 2011 sales	$ 8,018
Payments (Credits)	(19)
Balance at the end of the period	7,999
Trade Allowances
Activity related to product revenues allowances and reserve categories
Provision related to second quarter of 2011 sales	2,782
Payments (Credits)	(19)
Balance at the end of the period	2,763
Rebates, Chargebacks and Discounts
Activity related to product revenues allowances and reserve categories
Provision related to second quarter of 2011 sales	3,744
Balance at the end of the period	3,744
Product Returns
Activity related to product revenues allowances and reserve categories
Provision related to second quarter of 2011 sales	76
Balance at the end of the period	76
Other Incentives
Activity related to product revenues allowances and reserve categories
Provision related to second quarter of 2011 sales	1,416
Balance at the end of the period	$ 1,416