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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2011
Fair Value Measurements [Abstract] 
Carrying Amounts and Estimated Fair Values of Financial Instruments

 

September 30,

2011

 

December 31,

2010

 

Carrying

 

Fair

 

Carrying

 

Fair

 

Amount

 

Value

 

Amount

 

Value

 

(in thousands)

 

 

 

 

 

 

 

 

Cash and cash equivalents

 $          13,293

 

 $          13,293

 

 $          16,055

 

 $          16,055

Restricted cash

 $          69,261

 

 $          69,261

 

 $                 0

 

 $                 0

Unsecured revolving credit facility

 $        599,800

 

 $        599,800

 

 $        421,200

 

 $        421,200

Senior notes

 $        672,400

 

 $        774,915

 

 $        673,000

 

 $        761,372

Derivative instruments, net

 $        398,916

 

 $        398,916

 

 $        160,452

 

 $        160,452

Summary Assets and Liabilities Measured at Fair Value on Recurring Basis

 

September 30, 2011

 

 

 

Fair Value Measurements Using:

 

 

 

Quoted Prices

 

Significant

 

 

 

 

 

in Active

 

Other

 

Significant

 

 

 

Markets

 

Observable Inputs

 

Unobservable Inputs

 

Assets (Liabilities)

 

(Level 1)

 

(Level 2)

 

(Level 3)

 

at Fair Value

Derivative assets

 $                      0

 

 $                 286,131

 

 $                      126,438

 

 $              412,569

Derivative liabilities

                         0

 

                   (9,040)

 

                        (4,613)

 

                 (13,653)

Total

 $                      0

 

 $                 277,091

 

 $                      121,825

 

 $              398,916

 

 

 

December 31, 2010

 

 

 

Fair Value Measurements Using:

 

 

 

Quoted Prices

 

Significant

 

 

 

 

 

in Active

 

Other

 

Significant

 

 

 

Markets

 

Observable Inputs

 

Unobservable Inputs

 

Assets (Liabilities)

 

(Level 1)

 

(Level 2)

 

(Level 3)

 

at Fair Value

Derivative assets

 $                      0

 

 $                   86,883

 

 $                    121,442

 

 $              208,325

Derivative liabilities

                         0

 

                    (24,108)

 

                       (23,765)

 

                 (47,873)

Total

 $                      0

 

 $                   62,775

 

 $                      97,677

 

 $              160,452

Assets Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3), Reconciliation

 

 

For the three months ended

 

For the nine months ended

 

 

September 30,

 

September 30,

 

 

2011

 

2010

 

2011

 

2010

 

 

(in thousands)

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

 $      89,395

 

 $      53,566

 

 $      97,677

 

 $      24,720

Total gains or losses (realized/unrealized):

 

 

 

 

 

 

 

 

Included in earnings

 

         11,102

 

         14,956

 

         38,694

 

         48,743

Included in other comprehensive income

 

          35,223

 

         68,834

 

         23,913

 

         91,224

Purchases, issuances, and settlements:

 

 

 

 

 

 

 

 

Purchases

 

                  0

 

                  0

 

                   0

 

                  0

Issuances

 

                  0

 

                  0

 

                   0

 

                  0

Settlements

 

        (13,895)

 

        (13,493)

 

        (38,601)

 

        (40,824)

Transfers into/out of Level 3

 

                  0

 

                  0

 

              142

 

                  0

Balance at end of period

 

 $     121,825

 

 $    123,863

 

 $      121,825

 

 $     123,863

Change in unrealized gain (loss) included in earnings relating to derivatives still held as of September 30

 

$        (2,793)

 

$         1,463

 

$                93

 

$         7,919