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Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Goodwill, Gross |  |  |
Balance, beginning of period | $ 68,585 | $ 66,523 |
Foreign currency fluctuations | 321 | 2,062 |
Balance, end of period | 68,906 | 68,585 | 66,523
Accumulated Impairment Losses |  |  |
Balance, beginning of period | (48,868) | (46,220) |
Foreign currency fluctuations | (1,109) | (2,648) |
Balance, end of period | (49,977) | (48,868) | (46,220)
Goodwill, Net |  |  |
Balance, beginning of period | 19,717 | 20,303 |
Foreign currency fluctuations | (788) | (586) |
Balance, end of period | 18,929 | 19,717 | 20,303
Acquired Finite-lived Intangible Assets |  |  |
Original cost | 35,946 | 35,671 |
Accumulated amortization | (16,918) | (14,278) |
Intangible Assets, Net | 19,028 | 21,393 |
Impairment of Intangible Assets |  |  | 1,805
Amortization expense | 2,560 | 2,800 | 3,330
Estimated aggregate amortization expense of Intangible Assets |  |  |
2014 | 2,387 |  |
2015 | 2,204 |  |
2016 | 1,871 |  |
2017 | 1,768 |  |
2018 | 1,761 |  |
Thereafter | 9,037 |  |
Total | 19,028 |  |
Customer Lists and Service Contracts |  |  |
Acquired Finite-lived Intangible Assets |  |  |
Original cost | 23,763 | 23,817 |
Accumulated amortization | (11,609) | (9,907) |
Intangible Assets, Net | 12,154 | 13,910 |
Weighted-average original life (in years) | 15 years | 15 years |
Trade Name |  |  |
Acquired Finite-lived Intangible Assets |  |  |
Original cost | 4,836 | 4,657 |
Accumulated amortization | (1,976) | (1,565) |
Intangible Assets, Net | 2,860 | 3,092 |
Weighted-average original life (in years) | 14 years | 14 years |
Technology |  |  |
Acquired Finite-lived Intangible Assets |  |  |
Original cost | 7,347 | 7,197 |
Accumulated amortization | (3,333) | (2,806) |
Intangible Assets, Net | $ 4,014 | $ 4,391 |
Weighted-average original life (in years) | 13 years | 13 years |

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