Receivables (Details Textual) - USD ($) $ in Thousands |
Jun. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Other receivables | $ 22,520 | $ 21,834 |
Receivables, net | ||
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Income taxes receivable | 16,500 | 29,000 |
Nontrade receivables | 10,500 | 10,400 |
Escrow | Receivables, net | Environmental services | ||
Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
Other receivables | $ 8,000 | $ 8,000 |