XML 58 R43.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value Disclosures (Schedule Of Assets And Liabilities Fair Value) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Assets:    
Cash and cash equivalents $ 235,133 $ 266,651
Restricted cash 15,863 45,709
Inventories carried at market 58,710 26,834
Unrealized gains on derivatives 18,969 12,045
Other assets 114 115
Total assets measured at fair value 328,789 351,354
Liabilities:    
Accounts payable 9,961 37,401
Unrealized losses on derivatives 22,868 12,884
Other 84 92
Total liabilities measured at fair value 32,913 50,377
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Assets:    
Cash and cash equivalents 235,133 266,651
Restricted cash 15,863 45,709
Other assets 114 115
Total assets measured at fair value 251,110 312,475
Significant Other Observable Inputs (Level 2) [Member]    
Assets:    
Inventories carried at market 58,710 26,834
Unrealized gains on derivatives 18,969 12,045
Total assets measured at fair value 77,679 38,879
Liabilities:    
Accounts payable 9,961 37,401
Unrealized losses on derivatives 22,868 12,884
Other 84 92
Total liabilities measured at fair value $ 32,913 $ 50,377