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Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract] |  |  |  |
Net income |  | $ 393,968 | $ 182,871 | $ 81,520
Other comprehensive income/(loss), net of tax: |  |  |  |
Changes in unrealized gains/(losses) on available-for-sale securities, net of tax | [1],[2],[3] | (36,254) | 4,730 | 5,803
Changes in unrealized gains/(losses) on cash flow hedging instruments, net of tax | [2],[3],[4] | (792) | (320) | 7,288
Foreign currency translation adjustment, net of tax | [2],[3] | (5,691) | 7,896 | (12,600)
Total other comprehensive income/(loss), net of tax |  | (42,737) | 12,306 | 491
Comprehensive income |  | $ 351,231 | $ 195,177 | $ 82,011
[1] | Amounts are net of reclassifications to earnings of realized losses of $2.9 and realized gains of $0.2 million for the years ended December 31, 2018 and 2017, respectively. There were no reclassifications to earnings of realized gains for the year ended December 31, 2016.
[2] | Net of a tax benefit of $11.2 million and tax expenses of $3.3 million and $0.3 million for the years ended December 31, 2018, 2017, and 2016, respectively.
[3] | The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.1 million to retained earnings related to cash flow hedges and investment portfolio risk. The reclassification is reflected in the activity for the year ended December 31, 2018. See Note 2 for further details.
[4] | Amounts are net of reclassifications to earnings of gains of $4.9 million and losses of $0.6 million and $5.4 million for the years ended December 31, 2018, 2017, and 2016, respectively.

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