XML 12 R76.htm IDEA: XBRL DOCUMENT v2.4.0.8
Derivatives - Offsetting Assets and Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Assets    
Derivative assets, gross amounts $ 58,086 $ 130,403
Derivative assets, gross amounts offset (34,302) (35,764)
Derivative assets, current 8,306 71,022
Derivative assets, noncurrent 15,478 23,617
Derivative assets, amounts net of offset 23,784 94,639
Derivative assets, financial collateral 0 0
Derivative assets, net amount 23,784 94,639
Liabilities    
Derivative liabilities, gross amounts 95,315 110,411
Derivative liabilities, gross amounts offset (34,302) (35,764)
Derivative liabilities, current 36,471 14,860
Derivative liabilities, noncurrent 24,542 59,787
Derivative liabilities, amounts net of offset 61,013 74,647
Derivative liabilities, financial collateral (61,013) (74,647)
Derivative liabilities, net amount 0 0
Current assets
    
Assets    
Derivative assets, gross amounts 21,686 91,346
Derivative assets, gross amounts offset (13,380) (20,324)
Derivative assets, financial collateral 0 0
Derivative assets, net amount 8,306 71,022
Noncurrent assets
    
Assets    
Derivative assets, gross amounts 36,400 39,057
Derivative assets, gross amounts offset (20,922) (15,440)
Derivative assets, financial collateral 0 0
Derivative assets, net amount 15,478 23,617
Current liabilities
    
Liabilities    
Derivative liabilities, gross amounts 49,851 35,184
Derivative liabilities, gross amounts offset (13,380) (20,324)
Derivative liabilities, financial collateral (36,471) (14,860)
Derivative liabilities, net amount 0 0
Noncurrent liabilities
    
Liabilities    
Derivative liabilities, gross amounts 45,464 75,227
Derivative liabilities, gross amounts offset (20,922) (15,440)
Derivative liabilities, financial collateral (24,542) (59,787)
Derivative liabilities, net amount $ 0 $ 0