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Derivative Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The fair values of our derivative instruments are as follows:
|  |  |  | Fair Value
|  | Balance Sheet Location |  | December 31, 2018 |  | December 31, 2017
Derivatives Asset |  |  |  | (in thousands)
Derivatives designated as hedging instruments under Subtopic ASC 815-20 |  |  |  |
Interest rate swap contracts |  | Other current assets |  | $ | 1,866 |  |  | $ | 658 |
Interest rate cap contracts |  | Other current assets |  | 535 |  |  | 17 |
Cross currency swap contract |  | Other current assets |  | 1,631 |  |  | — |
Interest rate swap contracts |  | Other long-term assets |  | 746 |  |  | 1,712 |
Interest rate cap contracts |  | Other long-term assets |  | 251 |  |  | 179 |
Cross currency swap contract |  | Other long-term assets |  | 1,339 |  |  | — |
Derivatives not designated as hedging instruments under Subtopic ASC 815-20 |  |  |  |
Foreign exchange forward contracts |  | Other current assets |  | 157 |  |  | 41 |
Interest rate cap contracts |  | Other current assets |  | — |  |  | 25 |
Interest rate cap contracts |  | Other long-term assets |  | — |  |  | 268 |
Total asset derivatives |  |  |  | $ | 6,525 |  |  | $ | 2,900 |
Derivatives Liabilities |  |  |  |  |  |
Derivatives not designated as hedging instruments under Subtopic ASC 815-20 |  |  |  |
Foreign exchange forward contracts |  | Other current liabilities |  | $ | 337 |  |  | $ | 289 |
Accumulated OCI for Derivative and Nonderivative Instruments Designated as Hedging Instruments, Net of Tax | The change in AOCI, net of tax, for our derivative and nonderivative instruments designated as hedging instruments, net of tax, were as follows:
| 2018 |  | 2017 |  | 2016
| (in thousands)
Net unrealized loss on hedging instruments at January 1, | $ | (13,414 | ) |  | $ | (14,337 | ) |  | $ | (14,062 | )
Unrealized gain (loss) on derivative instruments | 2,586 |  |  | 360 |  |  | (1,087 | )
Realized (gains) losses reclassified into net income (loss) | (2,351 | ) |  | 563 |  |  | 812 |
Net unrealized loss on hedging instruments at December 31, | $ | (13,179 | ) |  | $ | (13,414 | ) |  | $ | (14,337 | )
Offsetting Assets | A summary of the potential effect of netting arrangements on our financial position related to the offsetting of our recognized derivative assets and liabilities under master netting arrangements or similar agreements is as follows:
Offsetting of Derivative Assets |  |  |  |  |
|  |  | Gross Amounts Not Offset in the Consolidated Balance Sheets |  |
| Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets |  | Derivative Financial Instruments |  | Cash Collateral Received |  | Net Amount
| (in thousands)
December 31, 2018 | $ | 6,525 |  |  | $ | (103 | ) |  | $ | — |  |  | $ | 6,422 |
December 31, 2017 | $ | 2,900 |  |  | $ | (90 | ) |  | $ | — |  |  | $ | 2,810 |
Offsetting Liabilities |
Offsetting of Derivative Liabilities |  |  |  |  |
|  |  | Gross Amounts Not Offset in the Consolidated Balance Sheets |  |
| Gross Amounts of Recognized Liabilities Presented in the Consolidated Balance Sheets |  | Derivative Financial Instruments |  | Cash Collateral Pledged |  | Net Amount
| (in thousands)
December 31, 2018 | $ | 337 |  |  | $ | (103 | ) |  | $ | — |  |  | $ | 234 |
December 31, 2017 | $ | 289 |  |  | $ | (90 | ) |  | $ | — |  |  | $ | 199 |
Derivative Instruments, Gain (Loss) | The before-tax effects of our accounting for derivative instruments designated as hedges on the Consolidated Balance Sheets and the Consolidated Statements of Operations were as follows:
Derivatives in Subtopic ASC 815-20 Cash Flow Hedging Relationships |  | Amount of Gain (Loss) Recognized in OCI on Derivative |  | Gain (Loss) Reclassified from AOCI into Income
Location |  | Amount
|  | 2018 |  | 2017 |  | 2016 |  |  |  | 2018 |  | 2017 |  | 2016
|  | (in thousands) |  |  |  | (in thousands)
Interest rate swap contracts |  | $ | 1,306 |  |  | $ | 768 |  |  | $ | (1,163 | ) |  | Interest expense |  | $ | 1,065 |  |  | $ | (706 | ) |  | $ | (1,296 | )
Interest rate cap contracts |  | 18 |  |  | (183 | ) |  | (605 | ) |  | Interest expense |  | (439 | ) |  | (210 | ) |  | (27 | )
Cross currency swap contract |  | 1,584 |  |  | — |  |  | — |  |  | Interest expense |  | 949 |  |  | — |  |  | — |
Cross currency swap contract |  | — |  |  | — |  |  | — |  |  | Other income (expense), net |  | 932 |  |  | — |  |  | — |
Foreign Exchange Derivatives Not Designated As Hedging Instruments | The effect of our derivative instruments not designated as hedges on the Consolidated Statements of Operations was as follows:
Derivatives Not Designated as Hedging Instrument under Subtopic ASC 815-20 |  | Location |  | Gain (Loss) Recognized in Income on Derivative
|  |  |  | 2018 |  | 2017 |  | 2016
|  |  |  | (in thousands)
Foreign exchange forward contracts |  | Other income (expense), net |  | $ | 3,448 |  |  | $ | (6,281 | ) |  | $ | 537 |
Interest rate cap contracts |  | Interest expense |  | 377 |  |  | (274 | ) |  | 129 |

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