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Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Statement Of Income And Comprehensive Income [Abstract] |  |  |
Net income |  | $ 88,761 | $ 65,512
Other comprehensive income/(loss), net of tax: |  |  |
Changes in unrealized gains/(losses) on available-for-sale securities | [1],[2],[3] | (13,071) | 3,777
Amortization of losses of securities transferred to held-to-maturity from available-for-sale | [1],[2] |  | 524
Changes in unrealized gains on cash flow hedging instruments | [1],[2],[4] | 2,706 | 1,033
Foreign currency translation adjustment | [1],[2] | 3,736 | 2,294
Total other comprehensive income/(loss), net of tax | [1],[2] | (6,629) | 7,628
Comprehensive income |  | $ 82,132 | $ 73,140
[1] | Net of tax benefit of $2.3 million and tax expense of $4.8 million for the three months ended March 31, 2018 and 2017, respectively.
[2] | The adoption of ASU 2018-02 on January 1, 2018 resulted in a reclassification of $3.0 million to retained earnings related to cash flow hedges and investment portfolio credit risk. See Note 2 for further details.
[3] | There were no reclassifications to earnings during the three months ended March 31, 2018 and 2017, respectively.
[4] | Amounts are net of reclassifications to earnings of gains of $0.5 million and losses of $0.9 million for the three months ended March 31, 2018 and 2017, respectively.

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