Commitments and Contingencies (Details - Other Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Lease arrangements [abstract]
2012	$ 34,737,000
2013	28,603,000
2014	23,594,000
2015	18,827,000
2016	18,776,000
2017 to 2019	23,818,000
Total future minimum lease payments	148,355,000
Commitments and Contingencies Other Details [Abstract]
Provision for uncollectible premiums receivable	8,200,000	12,600,000
Rent expense	37,000,000	36,100,000	30,900,000
Employment agreements		40,700,000
IT and computer agreements and lease contracts	16,100,000
[StrategicInvestmentsMember]
Unrecorded Unconditional Purchase Obligation [Line Items]
2012	61,200,000
2013	36,300,000
2014	25,900,000
2015	22,400,000
2016	11,700,000
Total	$ 157,500,000