XML 105 R84.htm IDEA: XBRL DOCUMENT

Derivative Instruments (Schedule of Call Options by Counterparty) (Details) (Call Options [Member], Not Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Notional amount	$ 19,277,639	$ 15,623,505
Fair value	856,050	415,258
Bank of America [Member]
Derivative [Line Items]
Notional amount	1,683,911	568,786
Fair value	73,836	16,533
Barclays [Member]
Derivative [Line Items]
Notional amount	2,396,839	3,463,777
Fair value	113,513	103,929
BNP Paribas [Member]
Derivative [Line Items]
Notional amount	1,382,661	2,207,097
Fair value	38,849	60,301
Citibank, N.A. [Member] [Member]
Derivative [Line Items]
Notional amount	1,536,547	2,878,588
Fair value	72,310	67,592
Credit Suisse [Member]
Derivative [Line Items]
Notional amount	4,060,352	936,625
Fair value	193,304	21,518
Deutsche Bank [Member]
Derivative [Line Items]
Notional amount	747,587	886,688
Fair value	41,074	20,787
HSBC [Member]
Derivative [Line Items]
Notional amount	200,011	295,520
Fair value	10,518	6,539
J.P. Morgan [Member]
Derivative [Line Items]
Notional amount	786,429	735,016
Fair value	36,863	21,940
Morgan Stanley [Member]
Derivative [Line Items]
Notional amount	3,546,487	1,590,505
Fair value	150,437	40,113
Royal Bank of Canada [Member]
Derivative [Line Items]
Notional amount	714,941	0
Fair value	25,140	0
Wells Fargo (Wachovia) [Member]
Derivative [Line Items]
Notional amount	2,221,874	2,060,903
Fair value	$ 100,206	$ 56,006