Changes in Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Changes in equity
Balance	$ 4,102,289	$ 3,930,586
Net income (loss)	32,836	(481)
Other comprehensive income (loss)	6,077	(15,614)
COMPREHENSIVE INCOME (LOSS)	38,913	(16,095)
Issuance of common stock	2,574	2,700
Purchase of treasury stock - net	(6,271)	(1,754)
Other (primarily stock compensation)	14,825	3,350
Dividends on common Stock		(57,358)
Balance	4,152,330	3,861,429
Common Shareholders
Changes in equity
Balance	3,972,806	3,821,850
Net income (loss)	24,444	(8,257)
Other comprehensive income (loss)	6,077	(15,614)
COMPREHENSIVE INCOME (LOSS)	30,521	(23,871)
Issuance of common stock	2,574	2,700
Purchase of treasury stock - net	(6,271)	(1,754)
Other (primarily stock compensation)	14,825	3,350
Dividends on common Stock		(57,358)
Balance	4,014,455	3,744,917
Noncontrolling Interests
Changes in equity
Balance	129,483	108,736
Net income (loss)	8,392	7,776
COMPREHENSIVE INCOME (LOSS)	8,392	7,776
Balance	$ 137,875	$ 116,512

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the economic entity, including both controlling (parent) and noncontrolling interests. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

+ References+ Details

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Research Bulletin (ARB)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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-Paragraph 38

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

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-Topic 810

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+ Details

- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References+ Details