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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2011
Fair Value Measurements  
Carrying Amounts and Estimated Fair Values of Financial Instruments

 

June 30,

2011

 

December 31,

2010

 

Carrying

 

Fair

 

Carrying

 

Fair

 

Amount

 

Value

 

Amount

 

Value

 

(in thousands)

 

 

 

 

 

 

 

 

Cash and cash equivalents

 $          13,279

 

 $          13,279

 

 $          16,055

 

 $          16,055

Restricted cash

 $          85,002

 

 $          85,002

 

 $                 0

 

 $                 0

Unsecured revolving credit facility

 $        544,200

 

 $        544,200

 

 $        421,200

 

 $        421,200

Senior notes

 $        672,400

 

 $        770,435

 

 $        673,000

 

 $        761,372

Derivative instruments

 $        203,160

 

 $        203,160

 

 $        160,452

 

 $        160,452

Summary Assets and Liabilities Measured at Fair Value on Recurring Basis

 

June 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

 

 $                 143,325

 

 $                      97,531

 

 $              240,856

Derivative liabilities

                         0

 

                   (29,560)

 

                        (8,136)

 

                 (37,696)

Total

 $                      0

 

 $                 113,765

 

 $                      89,395

 

 $              203,160

 

 

 

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 six months ended

 

 

June 30,

 

June 30,

 

 

2011

 

2010

 

2011

 

2010

 

 

(in thousands)

 

 

 

 

 

 

 

 

 

Balance at beginning of period

 

 $      85,580

 

 $      48,394

 

 $      97,677

 

 $      24,720

Total gains or losses (realized/unrealized):

 

 

 

 

 

 

 

 

Included in earnings

 

         11,682

 

         17,743

 

         27,592

 

         33,787

Included in other comprehensive income

 

           3,996

 

           3,151

 

        (11,310)

 

         22,390

Purchases, issuances, and settlements:

 

 

 

 

 

 

 

 

Purchases

 

                  0

 

                  0

 

                   0

 

                  0

Issuances

 

                  0

 

                  0

 

                   0

 

                  0

Settlements

 

        (11,863)

 

        (15,722)

 

        (24,706)

 

        (27,331)

Transfers into/out of Level 3

 

                  0

 

                  0

 

              142

 

                  0

Balance at end of period

 

 $      89,395

 

 $      53,566

 

 $      89,395

 

 $      53,566

Change in unrealized gains included in earnings relating to derivatives still held as of June 30

 

$           (181)

 

$         2,021

 

$         2,886

 

$         6,456