XML 62 R49.htm IDEA: XBRL DOCUMENT v3.10.0.1
Sales Contracts (Schedule of Sales Contracts) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Acquired Finite-Lived Intangible Assets And Liabilities By Major Class [Line Items]    
Original fair value, Assets $ 97,196 $ 97,196
Original fair value, Liabilities 31,742 31,742
Accumulated amortization, Asset (91,650) (84,760)
Accumulated amortization, Liabilities (30,570) (29,979)
Total, Assets 5,546 12,436
Total, Liabilities 1,172 1,763
Net Total 4,374 10,673
Liabilities 634 934
Other current Assets    
Acquired Finite-Lived Intangible Assets And Liabilities By Major Class [Line Items]    
Assets 5,544 12,432
Other Current Liabilities    
Acquired Finite-Lived Intangible Assets And Liabilities By Major Class [Line Items]    
Liabilities 634 934
Other Noncurrent Assets    
Acquired Finite-Lived Intangible Assets And Liabilities By Major Class [Line Items]    
Assets 2 4
Other Noncurrent Liabilities    
Acquired Finite-Lived Intangible Assets And Liabilities By Major Class [Line Items]    
Liabilities $ 538 $ 829