CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Statement of Comprehensive Income [Abstract] | ||
| Net income | $ 41,635 | $ 32,645 |
| Other comprehensive income: | ||
| Currency translation adjustment | 21,834 | 23,005 |
| Comprehensive income | $ 63,469 | $ 55,650 |