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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 78,837 | $ 78,702 | $ 58,583
Unrealized gains (losses) on available-for-sale securities: |  |  |
Unrealized gains (losses) arising during the period | 12,266 | (3,335) | (10,140)
Income tax effect | (4,378) | 1,317 | 3,759
Reclassification adjustments for (gains) losses included in net income | (8,800) | 7,237 | 85
Income tax effect | 3,432 | (2,714) | (32)
Net unrealized gains (losses) on available-for-sale securities | 2,520 | 2,505 | (6,328)
Unrealized gains (losses) on cash flow hedges: |  |  |
Unrealized gains (losses) arising during the period | 666 | (1,093) | (2,532)
Income tax effect | (260) | 464 | 998
Reclassification adjustment for losses included in net income | 2,634 | 1,946 | 0
Income tax effect | (1,027) | (730) | 0
Net unrealized gains (losses) on cash flow hedges | 2,013 | 587 | (1,534)
Other comprehensive income (loss), net of income tax effect | 4,533 | 3,092 | (7,862)
Comprehensive income | $ 83,370 | $ 81,794 | $ 50,721

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