Commitments and Contingencies (Details - Other Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Unrecorded Unconditional Purchase Obligation [Line Items]
2013	$ 51,400,000
2014	31,400,000
2015	24,400,000
2016	20,600,000
2017	7,800,000
Total	135,600,000
Lease arrangements [abstract]
2013	29,982,000
2014	26,546,000
2015	21,793,000
2016	21,436,000
2017	21,090,000
2018 to 2019	7,611,000
Total future minimum lease payments	128,458,000
Commitments and Contingencies Other Details [Line Items]
Provision for uncollectible premiums receivable	8,900,000	8,200,000
Rent expense	36,300,000	37,000,000	36,100,000
Employment agreements			40,700,000
IT and computer agreements and lease contracts	11,400,000
[StructuredLetterOfCreditMember]
Commitments and Contingencies Other Details [Line Items]
LOC obligations guaranteed as of balance sheet date	100,000,000
Line Of Credit Facility Term	10
Maturity date of facility	Dec. 29, 2020
Guarantor Obligations, Current Carrying Value	$ 0