Basis of Presentation and Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Rollforward of assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Balance at beginning of period			$ 17,527,000
Total gains (losses) (realized or unrealized):
Included in earnings			(1,471,000)
Included in other comprehensive income (loss)			2,373,000
Purchases, issuances, sales, and settlements:
Sales			(18,329,000)
Settlements			(100,000)
Balance at end of period	0		0
Product sales allowances and accruals
Discounts and chargebacks	6,846,000	3,579,000	12,738,000	5,799,000
Government and other rebates	1,672,000	2,737,000	3,132,000	5,271,000
Returns	(292,000)	369,000	(558,000)	668,000
Total provision for product sales allowances and accruals	8,226,000	6,685,000	15,312,000	11,738,000
Total gross product sales	22,646,000	19,766,000	43,440,000	35,841,000
Total provision for product sales allowances and accruals as a percent of total gross product sales	36.00%	34.00%	35.00%	33.00%
Typical average period from time of product sale to payment of rebate, up to or longer than			6 months
Reduction of reserve for product returns			1,100,000
Product returns reserve applied to gross sales			$ (600,000)	$ 700,000
Current expiration period for packaged products			4 years
Expiration period for certain manufactured lots			2 years