Derivatives (Details - Income Statement) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on derivatives recognized in income	$ (35,307)	$ (8,603)
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	(2,608)	8,650
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	(32,699)	(17,253)
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	(4,636)	8,255
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	2,028	395
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	(34,539)	(16,073)
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	(3)
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	2	243
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	465	218
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	(4,791)	(5,385)
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	3,671	3,747
Derivates not designated as hedges [Member] | Other Contract [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	$ 2,493	$ 0