Derivatives (Details - Income Statement) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	$ 23,850	$ (28,788)	$ (16,359)	$ 5,539
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	20,000	(782)	30,040	(41,096)
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	3,850	(28,006)	(46,399)	46,635
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	20,721	17	29,613	(36,457)
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	(721)	(799)	427	(4,639)
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	5,895	(30,233)	(44,606)	55,143
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	(6)	(3)	(126)
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	7	0	122
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	(50)	(110)	206	(660)
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	(1,213)	(1,762)	(595)	(5,421)
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	(1,055)	240	(9,788)	3,416
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	$ 273	$ 3,858	$ 8,387	$ (5,839)