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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 149,572 | $ 187,074 | $ 121,485
Cash flow hedges: |  |  |
Net unrealized gain (loss), net of tax of ($22), $22, and $0 in 2016, 2015, and 2014, respectively | (567) | (27) | (118)
Reclassification of net realized (gain) loss into current operations | 398 | 201 | 46
Net change related to cash flow hedges | (169) | 174 | (72)
Available-for-sale investments: |  |  |
Net unrealized gain (loss), net of tax of $248, ($279), and $40 in 2016, 2015, and 2014, respectively | 1,672 | (939) | 579
Reclassification of net realized (gain) loss into current operations | (191) | (344) | (673)
Net change related to available-for-sale investments | 1,481 | (1,283) | (94)
Foreign currency translation adjustments: |  |  |
Foreign currency translation adjustments, net of tax of ($228), ($711) and ($870) in 2016, 2015, and 2014, respectively | (5,616) | (11,616) | (9,400)
Net change related to foreign currency translation adjustments | (5,616) | (11,616) | (9,400)
Other comprehensive income (loss), net of tax | (4,304) | (12,725) | (9,566)
Total comprehensive income | $ 145,268 | $ 174,349 | $ 111,919

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