Derivatives (Details - Income Statement) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	$ (31,606)	$ 27,903	$ (40,210)	$ 34,327
Derivates not designated as hedges [Member] | Included in net foreign exchange gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	1,390	(57,279)	10,040	(40,314)
Derivates not designated as hedges [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	(32,996)	85,182	(50,250)	74,641
Derivates not designated as hedges [Member] | Foreign exchange forward contracts [Member] | Included in net foreign exchange gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	637	(54,004)	8,892	(36,474)
Derivates not designated as hedges [Member] | Foreign currency option contracts [Member] | Included in net foreign exchange gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	753	(3,275)	1,148	(3,840)
Derivates not designated as hedges [Member] | Futures contracts [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	(34,428)	91,679	(50,501)	85,376
Derivates not designated as hedges [Member] | Credit default swaps (protection purchased) [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	0	(22)	(3)	(120)
Derivates not designated as hedges [Member] | Credit default swaps (assumed risks) [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	0	8	0	115
Derivates not designated as hedges [Member] | Insurance-linked securities [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	13	2,469	256	(550)
Derivates not designated as hedges [Member] | Total return swaps [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	400	(2,988)	618	(3,659)
Derivates not designated as hedges [Member] | Interest rate swaps [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	(3,348)	2,399	(8,734)	3,176
Derivates not designated as hedges [Member] | TBAs [Member] | Included in net realized and unrealized investment gains and losses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	$ 4,367	$ (8,363)	$ 8,114	$ (9,697)