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Reconciliation of Total Segments to Income (Loss) Before Provision (Benefit) for Taxes and Total Assets (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||||||||||||||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Segment Reporting Information [Line Items] | ||||||||||||||||||||||
| Revenues | $ 1,216,845 | $ 1,223,090 | $ 3,903,788 | $ 2,802,328 | ||||||||||||||||||
| Expenses | 786,405 | 851,391 | 2,536,268 | 2,375,002 | ||||||||||||||||||
| Other Income (Loss) | 87,952 | (135,960) | 196,128 | 400,412 | ||||||||||||||||||
| Economic Income | 518,392 | 235,739 | 1,563,648 | 827,738 | ||||||||||||||||||
| Total Assets | 28,034,882 | 28,034,882 | ||||||||||||||||||||
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Operating Segments
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| Segment Reporting Information [Line Items] | ||||||||||||||||||||||
| Revenues | 1,225,786 | 1,219,623 | 3,918,292 | 2,838,028 | ||||||||||||||||||
| Expenses | 570,763 | 586,614 | 1,905,540 | 1,483,034 | ||||||||||||||||||
| Economic Income | 655,023 | 633,009 | 2,012,752 | 1,354,994 | ||||||||||||||||||
| Total Assets | 14,903,518 | 14,903,518 | ||||||||||||||||||||
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Consolidation Adjustments and Reconciling Items
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| Segment Reporting Information [Line Items] | ||||||||||||||||||||||
| Revenues | (8,941) | [1] | 3,467 | [1] | (14,504) | [1] | (35,700) | [1] | ||||||||||||||
| Expenses | 215,642 | [2] | 264,777 | [2] | 630,728 | [2] | 891,968 | [2] | ||||||||||||||
| Other Income (Loss) | 87,952 | [3] | (135,960) | [3] | 196,128 | [4] | 400,412 | [4] | ||||||||||||||
| Economic Income | (136,631) | [5] | (397,270) | [5] | (449,104) | [6] | (527,256) | [6] | ||||||||||||||
| Total Assets | $ 13,131,364 | [7] | $ 13,131,364 | [7] | ||||||||||||||||||
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