CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - Entity [Domain] - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income		$ 597,452	$ (511,314)	$ 672,278	$ (424,905)
Other comprehensive income (loss) before tax:
Foreign currency translation adjustment	[1]	(1,092)	(603)	(1,673)	(2,718)
Reclassification adjustment for (gains) losses included in net income (loss)	[1]	0	0	0	7,718
Amortization of net losses		5,025	2,126	10,050	4,252
Prior service cost		(950)	(950)	(1,900)	(1,900)
Unrealized holding gains (losses) on securities available-for-sale arising during the period		(41,191)	27,084	(5,849)	54,666
Other Comprehensive Income Loss Reclassification Adjustment From AOCI For Writedown Of Securities Before Tax		14,445	0	14,445	0
Reclassification adjustment for (gains) losses on securities available-for-sale included in net income (loss)		(5)	0	(5)	0
Unrealized net gains (losses) on cash flow hedges		1,004	(2,548)	(1,530)	(4,273)
Reclassification adjustment for (gains) losses on cash flow hedges included in net income (loss)		951	1,800	2,309	3,624
Other comprehensive income before tax		(21,813)	26,909	15,847	61,369
Income tax (expense) benefit		(2,818)	(925)	(5,006)	(2,915)
Total other comprehensive income (loss), net of tax		(24,631)	25,984	10,841	58,454
Comprehensive income (loss), net of tax		$ 572,821	$ (485,330)	$ 683,119	$ (366,451)

[1] All amounts presented are net of tax.