Funds Held - Directly Managed (Details - Maturity Profile) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Funds Held Directly Managed Other Details [Line Items]
Cash and cash equivalents	$ 1,496,485,000	$ 1,121,705,000	$ 1,342,257,000	$ 2,111,084,000
Accrued investment income	185,717,000	184,315,000
Funds held directly managed [Member]
Funds Held Directly Managed Other Details [Line Items]
Cash and cash equivalents	84,800,000	53,700,000
Other assets	132,900,000	33,400,000
Accrued investment income	6,700,000	10,200,000
Funds held directly managed [Member] | Cost [Member]
Maturity Profile [Abstract]
One year or less	88,453,000
More than one year through five years	317,214,000
More than five years through ten years	103,231,000
More than ten years	17,286,000
Total	526,184,000
Funds held directly managed [Member] | Fair value [Member]
Maturity Profile [Abstract]
One year or less	89,436,000
More than one year through five years	330,805,000
More than five years through ten years	108,761,000
More than ten years	17,139,000
Total	$ 546,141,000