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DERIVATIVE INSTRUMENTS (Tables) | 12 Months Ended
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Dec. 31, 2018
General Discussion of Derivative Instruments and Hedging Activities [Abstract] |
Schedule of Notional and Fair Value Amounts of Outstanding Derivative Instruments |
|  | Notional amount |  |  | Fair value (Level 2 within the fair value hierarchy) |
|  | December 31, |  |  | December 31, |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Option contracts to hedge payroll |  |  |  |  |  |  |  |  |  |  |  |
expenses ILS |  | $ | 73,950 |  |  | $ | 4,000 |  |  | $ | (2,566 | ) |  | $ | 46 |
expenses INR |  |  | 40,391 |  |  |  | 17,800 |  |  |  | 807 |  |  |  | 232 |
Option contracts to hedge facility expenses ILS |  |  | 5,200 |  |  |  | - |  |  |  | (137 | ) |  |  | - |
expenses INR |  |  | 3,874 |  |  |  | 1,846 |  |  |  | 80 |  |  |  | 19 |
Forward contracts to hedge payroll |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
expenses ILS |  |  | 53,500 |  |  |  | 30,000 |  |  |  | (1,926 | ) |  |  | 947 |
expenses INR |  |  | - |  |  |  | 400 |  |  |  | - |  |  |  | 6 |
expenses PHP |  |  | 4,452 |  |  |  | - |  |  |  | 187 |  |  |  | - |
Forward contracts to hedge facility expenses PHP |  |  | 628 |  |  |  | - |  |  |  | 28 |  |  |  | - |
|  | $ | 181,995 |  |  | $ | 54,046 |  |  | $ | (3,527 | ) |  | $ | 1,250 |
Schedule of Fair Value of Derivative Instruments by Balance Sheet Location | The fair value of the Company's outstanding derivative instruments at December 31, 2018 and 2017 is summarized below:
|  |  | Fair value of derivative instruments |
|  |  | December 31, |
| Balance sheet line item |  | 2018 |  |  | 2017 |
Derivative assets: |  |  |  |  |  |  |
Foreign exchange option contracts | Prepaid expenses and other current assets |  | $ | 888 |  |  | $ | 297 |
Foreign exchange forward contracts | Prepaid expenses and other current assets |  | $ | 214 |  |  | $ | 953 |
Derivative liabilities: |  |  |  |  |  |  |  |  |
Foreign exchange option contracts | Accrued expenses and other liabilities |  | $ | (2,703 | ) |  | $ | - |
Foreign exchange forward contracts | Accrued expenses and other liabilities |  | $ | (1,926 | ) |  | $ | - |
Schedule of Effect of Derivative Instruments in Cash Flow Hedging Relationship on Income and Other Comprehensive Income | The effect of derivative instruments in cash flow hedging relationship on income and other comprehensive income for the years ended December 31, 2018, 2017 and 2016 is summarized below:
|  | Amount of gain (loss) recognized in other comprehensive income on derivative, net of tax (effective portion) |
|  | Year ended December 31, |
|  | 2018 |  |  | 2017 |  |  | 2016 |
Derivatives in foreign exchange cash flow hedging relationships: |  |  |  |  |  |  |  |  |
Forward contracts |  | $ | (6,059 | ) |  | $ | 3,317 |  |  | $ | (202 | )
Option contracts |  |  | (2,571 | ) |  |  | 3,504 |  |  |  | 802 |
|  | $ | (8,630 | ) |  | $ | 6,821 |  |  | $ | 600 |
Derivatives in foreign exchange cash flow hedging relationships:
|  |  | Amount of gain (loss) reclassified from other comprehensive income into income (expenses), net of tax (effective portion) |
|  |  | Year ended December 31, |
| Statements of income line item |  | 2018 |  |  | 2017 |  |  | 2016 |
Option contracts to hedge payroll and facility expenses | Cost of revenues, operating expenses and discontinued operations |  | $ | 66 |  |  | $ | (2,429 | ) |  | $ | (132 | )
Forward contracts to hedge payroll and facility expenses | Cost of revenues and operating expenses |  |  | 4,715 |  |  |  | (3,157 | ) |  |  | - |
|  |  | $ | 4,781 |  |  | $ | (5,586 | ) |  | $ | (132 | )

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