CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract] | |||
| Foreign currency translation adjustment, tax effect | $ (648) | $ (194) | $ (219) |
| Unrealized holding gains (losses) on marketable securities, tax effect | (2) | 5 | 90 |
| Change in unfunded SERP liability, tax | $ 71 | $ 2 | $ (631) |