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OTHER COMPREHENSIVE GAIN (LOSS) | 12 Months Ended
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Dec. 31, 2017
OTHER COMPREHENSIVE GAIN (LOSS) | 3. OTHER COMPREHENSIVE GAIN (LOSS) Other comprehensive gain (loss) consists of the foreign currency translation adjustment associated with our Canadian operations’ use of the Canadian dollar as its functional currency and changes in the unrealized gains (losses) on cash flow hedging instruments and available-for-sale securities. The tax effects allocated to each component of other comprehensive loss were as follows:
Years Ended December 31, |  | 2017 |  |  | 2016 |  |  | 2015 |
Foreign currency translation adjustment |  | $ | 15,993 |  |  | $ | 6,211 |  |  | $ | (39,378 | )
Unrealized (loss) gain on cash flow hedging instruments |  |  | (961 | ) |  |  | (1,321 | ) |  |  | 3,716 |
Income tax benefit (expense) |  |  | 259 |  |  |  | 356 |  |  |  | (1,003 | )
Unrealized (loss) gain on cash flow hedging instruments, net of tax |  |  | (702 | ) |  |  | (965 | ) |  |  | 2,713 |
Reclassification of (gain) loss on cash flow hedging instruments into earnings |  |  | (491 | ) |  |  | 442 |  |  |  | (2,730 | )
Income tax expense (benefit) |  |  | 133 |  |  |  | (119 | ) |  |  | 737 |
Reclassification of (gain) loss on cash flow hedging instruments into earnings, net of tax |  |  | (358 | ) |  |  | 323 |  |  |  | (1,993 | )
Unrealized gain (loss) on available-for-sale securities |  |  | 51 |  |  |  | 27 |  |  |  | (12 | )
Income tax (expense) benefit |  |  | (66 | ) |  |  | (13 | ) |  |  | 4 |
Unrealized (loss) gain on available-for-sale securities, net of tax |  |  | (15 | ) |  |  | 14 |  |  |  | (8 | )
Other comprehensive gain (loss) |  | $ | 14,918 |  |  | $ | 5,583 |  |  | $ | (38,666 | )
The changes in each component of accumulated other comprehensive loss, net of tax, were as follows:
Years Ended December 31, |  | 2017 |  |  | 2016 |  |  | 2015 |
Foreign currency translation adjustment: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | (43,459 | ) |  | $ | (47,204 | ) |  | $ | (23,623 | )
Current period other comprehensive gain (loss) |  |  | 9,960 |  |  |  | 3,745 |  |  |  | (23,581 | )
Ending balance |  |  | (33,499 | ) |  |  | (43,459 | ) |  |  | (47,204 | )
Cash flow hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  | 215 |  |  |  | 600 |  |  |  | 168 |
Current period other comprehensive (loss) income |  |  | (421 | ) |  |  | (579 | ) |  |  | 1,628 |
Less reclassification adjustment |  |  | (215 | ) |  |  | 194 |  |  |  | (1,196 | )
Ending balance |  |  | (421 | ) |  |  | 215 |  |  |  | 600 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  | (286 | ) |  |  | (300 | ) |  |  | (292 | )
Current period other comprehensive (loss) income |  |  | (15 | ) |  |  | 14 |  |  |  | (8 | )
Ending balance |  |  | (301 | ) |  |  | (286 | ) |  |  | (300 | )
Accumulated other comprehensive loss, net of tax |  | $ | (34,221 | ) |  | $ | (43,530 | ) |  | $ | (46,904 | )

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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