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Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2011
Fair Value Measurements [Abstract]  
The estimated fair value of financial instruments that are measured at fair value on a recurring basis
                                     
        December 31, 2011     December 31, 2010  
     Fair
Value
Hierarchy
Level (1)
  Carrying
Amount
Asset
(Liability)

$
    Fair
Value
Asset
(Liability)

$
    Carrying
Amount
Asset
(Liability)

$
    Fair
Value
Asset
(Liability)

$
 

Cash and cash equivalents and restricted cash

        589,261       589,261       653,193       653,193  

Advances to and from affiliates and joint venture

        (5,478     (5,478 )       (127,218     (127,218 )  

Long-term debt (note 10)

        (1,315,231     (1,191,117     (1,399,115     (1,292,026

Advances to and from joint venture partners (note 8)

        10,200       —   (2)       10,141       —   (2)  

Derivative instruments (note 13)

                                   

Interest rate swap agreements – assets

  Level 2     159,603       159,603       66,870       66,870  

Interest rate swap agreements – liabilities

  Level 2     (304,066     (304,066 )       (201,463     (201,463 )  

Other derivative

  Level 3     (600     (600 )       (10,000     (10,000 )  

 

(1) The fair value hierarchy level is only applicable to each financial instrument on the consolidated balance sheets that are recorded at fair value on a recurring basis.
(2) The fair value of the Partnership’s advances to and from its joint venture partners as at December 31, 2011 and 2010 was not determinable given the amounts are non-current with no fixed repayment terms (see Note 8).
Changes in fair value of assets (liabilities) that are measured on a recurring basis using significant unobservable inputs (Level 3)
                 
    Year ended December 31,  
    2011
$
    2010
$
 
     

Fair value at January 1

    (10,000     (10,600

Realized and unrealized gains (losses) included in earnings

    9,307       (1,319

Settlements

    93       1,919  
   

 

 

   

 

 

 

Fair value at December 31

    (600     (10,000