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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 487,476 | $ 288,934 | $ 250,327
Other comprehensive income (loss): |  |  |
Unrealized losses on investments | (2,561) | (716) | (1,792)
Unrealized gains (losses) on cash flow hedges | 11,907 | 19,195 | 13,764
Total unrealized gains (losses) | 9,346 | 18,479 | 11,972
Income tax (expense) benefit | (2,333) | (7,060) | (4,584)
Other comprehensive income (losses), net of tax (expense) benefit | 7,013 | 11,419 | 7,388
Total comprehensive income | $ 494,489 | $ 300,353 | $ 257,715

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