Commitments, Contingencies And Other Matters (Details) (USD $)	0 Months Ended							1 Months Ended		3 Months Ended	12 Months Ended
	Aug. 24, 2011	Jun. 02, 2011	Mar. 25, 2011	Jan. 05, 2011	Dec. 17, 2010	Aug. 25, 2010	Jan. 29, 2007	Oct. 18, 2011	Sep. 01, 2011	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commitments Contingencies And Other Matters [Line Items]
Minimum rental commitments under non-cancelable operating leases, Current											$ 26,300,000
Minimum rental commitments under non-cancelable operating leases, 2012											5,400,000
Minimum rental commitments under non-cancelable operating leases, 2013											5,000,000
Minimum rental commitments under non-cancelable operating leases, 2014											4,600,000
Minimum rental commitments under non-cancelable operating leases, 2015											3,900,000
Minimum rental commitments under non-cancelable operating leases, Thereafter											7,400,000
Rent expense charged to operations											4,900,000	7,200,000	6,900,000
Percentage of employee contribution under retirement savings plan											6.00%
Percentage of contribution by employer under retirement savings plan											50.00%
Vesting percentage of retirement savings plan											20.00%
Vesting period of retirement savings plan, in years											5
Expenses realized with regard to retirement savings plan											1,200,000	1,200,000	1,400,000
Number of consolidated lawsuits							2
Number of counties where Company is named defendant											46
Payment for settlement of suits	154,000,000		1,700,000	2,500,000	500,000	2,250,000							3,500,000
Number of states where Medicaid payments affected by litigation											49
Accrued legal settlements											37,800,000
Payments related to the settlement of certain AWP litigation		23,000,000						884,000	3,600,000	154,000,000
Anchen [Member]
Commitments Contingencies And Other Matters [Line Items]
Percentage of employee contribution under retirement savings plan											100.00%
Percentage of contribution by employer under retirement savings plan											3.00%
Expenses realized with regard to retirement savings plan											$ 50,000
Percentage of employee contribution under retirement savings plan for 50% of employer contribution											50.00%
Percentage of employer contribution under retirement savings plan for the next two percentage contributed											2.00%
Maximum [Member]
Commitments Contingencies And Other Matters [Line Items]
Percentage of employee contribution under retirement savings plan											25.00%
Minimum [Member]
Commitments Contingencies And Other Matters [Line Items]
Percentage of employee contribution under retirement savings plan											1.00%