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Derivatives (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Foreign Currency Derivative Contracts | As of December 31, 2017 and 2016, we had the following foreign currency derivative contracts outstanding in U.S. dollars (in thousands):
|  | December 31, 2017
|  | Notional |  | Contractual |  | Settlement
Derivative Contracts |  | Amount |  | Exchange Rate |  | Date
Canadian dollar |  | $ | 6,226 |  |  | 1.2850 |  | 3/15/2018
Euro |  | 5,326 |  |  | 1.1836 |  | 3/15/2018
Norwegian krone |  | 6,212 |  |  | 8.3704 |  | 3/15/2018
Pound sterling |  | 6,039 |  |  | 1.3419 |  | 3/15/2018
|  | December 31, 2016
|  | Notional |  | Contractual |  | Settlement
Derivative Contracts |  | Amount |  | Exchange Rate |  | Date
Canadian dollar |  | $ | 4,553 |  |  | 1.3179 |  | 3/14/2017
Euro |  | 4,753 |  |  | 1.0563 |  | 3/14/2017
Euro |  | 2,558 |  |  | 1.0659 |  | 1/13/2017
Norwegian krone |  | 3,643 |  |  | 8.5101 |  | 3/14/2017
Pound sterling |  | 3,908 |  |  | 1.2607 |  | 3/14/2017
Schedule of Fair Value by Balance Sheet Location | The following table summarizes the location and fair value amounts of all derivative contracts in the consolidated balance sheets as of December 31, 2017 and 2016 (in thousands):
Derivatives not designated as Hedging Instruments |  | Consolidated Balance Sheet Location |  | December 31, 2017 |  | December 31, 2016
Foreign currency contracts |  | Accounts receivable, net |  | $ | — |  |  | $ | 146 |
Foreign currency contracts |  | Accrued and other current liabilities |  | (487 | ) |  | — |
Impact of Derivative Instruments on the Income Statement | The following table summarize the location and amounts of the unrealized and realized gains and losses on derivative contracts in the consolidated statements of operations as of December 31, 2017, 2016 and 2015 (in thousands):
Derivatives not designated as Hedging Instruments |  | Location of gain (loss) recognized in income on derivative contracts |  | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015
Unrealized gain (loss) on foreign currency contracts |  | Other income, net |  | $ | (634 | ) |  | $ | (64 | ) |  | $ | 210 |
Realized loss on foreign currency contracts |  | Other income, net |  | (1,699 | ) |  | (296 | ) |  | — |
Total net gain (loss) on foreign currency contracts |  |  |  | $ | (2,333 | ) |  | $ | (360 | ) |  | $ | 210 |
Offsetting Assets | The following table presents the gross and net fair values of our derivatives as of December 31, 2017 and 2016 (in thousands):
|  | Derivative Asset Positions |  | Derivative Liability Positions
|  | December 31, |  | December 31,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
Gross position - asset / (liability) |  | $ | — |  |  | $ | 181 |  |  | $ | (487 | ) |  | $ | (35 | )
Netting adjustment |  | — |  |  | (35 | ) |  | — |  |  | 35 |
Net position - asset / (liability) |  | $ | — |  |  | $ | 146 |  |  | $ | (487 | ) |  | $ | — |
Offsetting Liabilities | The following table presents the gross and net fair values of our derivatives as of December 31, 2017 and 2016 (in thousands):
|  | Derivative Asset Positions |  | Derivative Liability Positions
|  | December 31, |  | December 31,
|  | 2017 |  | 2016 |  | 2017 |  | 2016
Gross position - asset / (liability) |  | $ | — |  |  | $ | 181 |  |  | $ | (487 | ) |  | $ | (35 | )
Netting adjustment |  | — |  |  | (35 | ) |  | — |  |  | 35 |
Net position - asset / (liability) |  | $ | — |  |  | $ | 146 |  |  | $ | (487 | ) |  | $ | — |

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