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Derivative Financial Instruments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Derivative Financial Instruments |
Components of gain (loss) on derivatives, net |
|  | Year Ended December 31, |
--- | --- | --- | ---
|  | 2011 |  | 2010 |  | 2009 |
|  | (in thousands) |
Realized gain (loss) on swap agreements |  | $ | — |  | $ | — |  | $ | (14,331 | )
Unrealized gain (loss) on swap agreements |  |  | — |  |  | — |  |  | (40,903 | )
Realized gain (loss) on other derivative agreements |  |  | (7,182 | ) |  | 721 |  |  | (6,646 | )
Unrealized gain (loss) on other derivative agreements |  |  | 85,262 |  |  | (2,196 | ) |  | (1,847 | )
Realized gain (loss) on interest rate swap agreements |  |  | — |  |  | (2,860 | ) |  | (6,518 | )
Unrealized gain (loss) on interest rate swap agreements |  |  | — |  |  | 2,830 |  |  | 4,959 |
Total gain (loss) on derivatives, net |  | $ | 78,080 |  | $ | (1,505 | ) | $ | (65,286 | )

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- Definition Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 205G -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 44C -Subparagraph b -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. + Details
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