Impairments and Other Charges (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Component of impairment and other charges
Provision for termination payment	$ 100,000
Provision for retirement of long-lived assets	98,072	23,213	64,229
Impairment of long-lived assets		27,372
Goodwill impairments		10,707
Less other-than-temporary impairment recognized in accumulated other comprehensive income (loss)			(4,651)
Credit related impairment on debt securities			35,649
Impairments and other charges	198,072	61,292	118,543
Equity Securities [Member]
Component of impairment and other charges
Impairments and other charges			18,665
Debt Securities [Member]
Component of impairment and other charges
Impairments and other charges			$ 40,300

The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value.

+ References+ Details

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details