2013 | 2012 | 2011 | ||||||||||
Balance at January 1 | $ | 3,071 | $ | 3,481 | $ | 3,507 | ||||||
Foreign currency effects | (58 | ) | 4 | (2 | ) | |||||||
Additions based on tax positions taken in current year | 276 | 543 | 469 | |||||||||
Additions/reductions resulting from current-year asset acquisitions/sales | — | — | (41 | ) | ||||||||
Additions for tax positions taken in prior years | 1,164 | 152 | 236 | |||||||||
Reductions for tax positions taken in prior years | (176 | ) | (899 | ) | (366 | ) | ||||||
Settlements with taxing authorities in current year | (320 | ) | (138 | ) | (318 | ) | ||||||
Reductions as a result of a lapse of the applicable statute of limitations | (109 | ) | (72 | ) | (4 | ) | ||||||
Balance at December 31 | $ | 3,848 | $ | 3,071 | $ | 3,481 |