Commitments and Contingencies	3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Matters In connection with a theft of fuel product valued at approximately $18.0 million, we recorded an insurance receivable for the full amount of the loss, which is included in other current assets in the accompanying consolidated balance sheets. On July 31, 2014, our insurer, AGCS Marine Insurance Company (“AGCS”), filed a declaratory judgment action against us in the United States District Court for the Southern District of New York (“District Court”) seeking a court ruling that the loss is not covered under our policy. In May 2016, the District Court entered an order granting summary judgment in our favor holding that the loss is covered under the AGCS policy. On March 27, 2017, we entered into a confidential settlement agreement pursuant to which we collected from AGCS the full amount of the insurance receivable, plus additional reimbursements, and the parties exchanged full and final releases in respect of the matter. Tax Matters From time to time, we are under review by various domestic and foreign tax authorities with regards to indirect tax matters and are involved in various challenges and litigation in a number of countries, including, in particular, Brazil and South Korea, where the amounts under controversy may be significant. During the quarter ended December 31, 2016, the Korean branch (“WFSK”) of one of our subsidiaries received assessments of approximately $10.4 million (KRW 11.9 billion) and a pre-assessment notice for an additional $17.6 million (KRW 20.1 billion) from the regional tax authorities of Seoul, South Korea (“SRTO”). The assessments primarily consist of fines and penalties for allegedly failing to issue Value Added Tax ("VAT") invoices and report certain transactions during the period 2011-2014. These assessments do not involve failure to pay or collect VAT. We believe that these assessments are without merit and are currently appealing the actions. In addition to these assessments, in November 2016, the SRTO referred the case to the Seoul Central District Prosecutors Office (“SCDPO”) for investigation and determination as to whether the alleged invoicing and reporting violations should be subject to criminal action under Korean law. On March 30, 2017, the SCDPO issued a decision not to bring a criminal action against us. This decision is subject to appeal by the SRTO. We are also involved in a number of tax disputes with federal, state and municipal tax authorities in Brazil, relating primarily to VAT (ICMS) tax matters. These disputes are at various stages of the legal process, including the administrative review phase and the collection action phase, and include assessments of fixed amounts of principal and penalties, plus interest. When we deem it appropriate and the amounts are reasonably estimable, we establish reserves for potential adjustments to our provision for the accrual of indirect taxes that may result from examinations or other actions by tax authorities. If events occur which indicate payment of these amounts is unnecessary, the reversal of the liabilities would result in the recognition of benefits in the period we determine the liabilities are no longer necessary. If our estimates of any of our federal, state, and foreign indirect tax liabilities are less than the ultimate assessment, it could result in a further charge to expense. Except with respect to the matters described above, we believe that the final outcome of any pending examinations, agreements, administrative or judicial proceedings will not have a material effect on our results of operations or cash flows. Other Matters On August 31, 2016, Hanjin Shipping Co., Ltd. (“Hanjin”), one of our customers in our marine segment, filed for bankruptcy protection in South Korea and on September 1, 2016, the Korean Rehabilitation Court accepted Hanjin’s application for rehabilitation. On February 17, 2017, the Korean Rehabilitation Court formally adjudicated the liquidation of Hanjin. As of March 31, 2017, we had outstanding Hanjin receivables of approximately $4.0 million, net of anticipated insurance recoveries of approximately $4.0 million. While we believe we will recover all or substantially all of the outstanding Hanjin and insurance receivables, there can be no assurance that we will be able to recover all of the remaining amounts. We are also a party to various claims, complaints and proceedings arising in the ordinary course of our business including, but not limited to, environmental claims, commercial and governmental contract claims, such as property damage, demurrage, personal injury, billing and fuel quality claims, as well as bankruptcy preference claims and administrative claims. We have established loss provisions for these ordinary course claims as well as other matters in which losses are probable and can be reasonably estimated. As of March 31, 2017, we had recorded certain reserves which were not significant. For those matters where a reserve has not been established and for which we believe a loss is reasonably possible, as well as for matters where a reserve has been recorded but for which an exposure to loss in excess of the amount accrued is reasonably possible, we believe that such losses will not have a material adverse effect on our consolidated financial statements. However, any adverse resolution of one or more such claims, complaints or proceedings during a particular period could have a material adverse effect on our consolidated financial statements or disclosures for that period. Our estimates regarding potential losses and materiality are based on our judgment and assessment of the claims utilizing currently available information. Although we will continue to reassess our reserves and estimates based on future developments, our objective assessment of the legal merits of such claims may not always be predictive of the outcome and actual results may vary from our current estimates.

Commitments and Contingencies

Legal Matters

In connection with a theft of fuel product valued at approximately $18.0 million, we recorded an insurance receivable for the full amount of the loss, which is included in other current assets in the accompanying consolidated balance sheets. On July 31, 2014, our insurer, AGCS Marine Insurance Company (“AGCS”), filed a declaratory judgment action against us in the United States District Court for the Southern District of New York (“District Court”) seeking a court ruling that the loss is not covered under our policy. In May 2016, the District Court entered an order granting summary judgment in our favor holding that the loss is covered under the AGCS policy. On March 27, 2017, we entered into a confidential settlement agreement pursuant to which we collected from AGCS the full amount of the insurance receivable, plus additional reimbursements, and the parties exchanged full and final releases in respect of the matter.

Tax Matters

From time to time, we are under review by various domestic and foreign tax authorities with regards to indirect tax matters and are involved in various challenges and litigation in a number of countries, including, in particular, Brazil and South Korea, where the amounts under controversy may be significant.

During the quarter ended December 31, 2016, the Korean branch (“WFSK”) of one of our subsidiaries received assessments of approximately $10.4 million (KRW 11.9 billion) and a pre-assessment notice for an additional $17.6 million (KRW 20.1 billion) from the regional tax authorities of Seoul, South Korea (“SRTO”). The assessments primarily consist of fines and penalties for allegedly failing to issue Value Added Tax ("VAT") invoices and report certain transactions during the period 2011-2014. These assessments do not involve failure to pay or collect VAT. We believe that these assessments are without merit and are currently appealing the actions. In addition to these assessments, in November 2016, the SRTO referred the case to the Seoul Central District Prosecutors Office (“SCDPO”) for investigation and determination as to whether the alleged invoicing and reporting violations should be subject to criminal action under Korean law. On March 30, 2017, the SCDPO issued a decision not to bring a criminal action against us. This decision is subject to appeal by the SRTO.

We are also involved in a number of tax disputes with federal, state and municipal tax authorities in Brazil, relating primarily to VAT (ICMS) tax matters. These disputes are at various stages of the legal process, including the administrative review phase and the collection action phase, and include assessments of fixed amounts of principal and penalties, plus interest.

When we deem it appropriate and the amounts are reasonably estimable, we establish reserves for potential adjustments to our provision for the accrual of indirect taxes that may result from examinations or other actions by tax authorities. If events occur which indicate payment of these amounts is unnecessary, the reversal of the liabilities would result in the recognition of benefits in the period we determine the liabilities are no longer necessary. If our estimates of any of our federal, state, and foreign indirect tax liabilities are less than the ultimate assessment, it could result in a further charge to expense. Except with respect to the matters described above, we believe that the final outcome of any pending examinations, agreements, administrative or judicial proceedings will not have a material effect on our results of operations or cash flows.

Other Matters

On August 31, 2016, Hanjin Shipping Co., Ltd. (“Hanjin”), one of our customers in our marine segment, filed for bankruptcy protection in South Korea and on September 1, 2016, the Korean Rehabilitation Court accepted Hanjin’s application for rehabilitation. On February 17, 2017, the Korean Rehabilitation Court formally adjudicated the liquidation of Hanjin. As of March 31, 2017, we had outstanding Hanjin receivables of approximately $4.0 million, net of anticipated insurance recoveries of approximately $4.0 million. While we believe we will recover all or substantially all of the outstanding Hanjin and insurance receivables, there can be no assurance that we will be able to recover all of the remaining amounts.

We are also a party to various claims, complaints and proceedings arising in the ordinary course of our business including, but not limited to, environmental claims, commercial and governmental contract claims, such as property damage, demurrage, personal injury, billing and fuel quality claims, as well as bankruptcy preference claims and administrative claims. We have established loss provisions for these ordinary course claims as well as other matters in which losses are probable and can be reasonably estimated. As of March 31, 2017, we had recorded certain reserves which were not significant. For those matters where a reserve has not been established and for which we believe a loss is reasonably possible, as well as for matters where a reserve has been recorded but for which an exposure to loss in excess of the amount accrued is reasonably possible, we believe that such losses will not have a material adverse effect on our consolidated financial statements. However, any adverse resolution of one or more such claims, complaints or proceedings during a particular period could have a material adverse effect on our consolidated financial statements or disclosures for that period.

Our estimates regarding potential losses and materiality are based on our judgment and assessment of the claims utilizing currently available information. Although we will continue to reassess our reserves and estimates based on future developments, our objective assessment of the legal merits of such claims may not always be predictive of the outcome and actual results may vary from our current estimates.