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Goodwill and Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |  | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 | Sep. 30, 2014 Customer Lists | Dec. 31, 2013 Customer Lists | Sep. 30, 2014 Trade Name | Dec. 31, 2013 Trade Name | Sep. 30, 2014 Technology | Dec. 31, 2013 Technology
Goodwill, Gross |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  |  | $ 68,906 |  |  |  |  |  |  |  |
Foreign currency fluctuations |  |  | (1,780) |  |  |  |  |  |  |  |
Balance, end of period | 67,126 |  | 67,126 |  |  |  |  |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  |  | (49,977) |  |  |  |  |  |  |  |
Foreign currency fluctuations |  |  | 1,576 |  |  |  |  |  |  |  |
Balance, end of period | (48,401) |  | (48,401) |  |  |  |  |  |  |  |
Goodwill, Net |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period |  |  | 18,929 |  |  |  |  |  |  |  |
Foreign currency fluctuations |  |  | (204) |  |  |  |  |  |  |  |
Balance, end of period | 18,725 |  | 18,725 |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets |  |  |  |  |  |  |  |  |  |  |
Original cost | 34,463 |  | 34,463 |  | 35,946 | 22,933 | 23,763 | 4,481 | 4,836 | 7,049 | 7,347
Accumulated amortization | (17,783) |  | (17,783) |  | (16,918) | (12,297) | (11,609) | (2,074) | (1,976) | (3,412) | (3,333)
Intangible Assets, Net | 16,680 |  | 16,680 |  | 19,028 | 10,636 | 12,154 | 2,407 | 2,860 | 3,637 | 4,014
Weighted-average original life |  |  |  |  |  | 15 years | 15 years | 14 years | 14 years | 13 years | 13 years
Amortization expense | 589 | 633 | 1,812 | 1,914 |  |  |  |  |  |  |
Estimated aggregate amortization expense of Intangible Assets |  |  |  |  |  |  |  |  |  |  |
Remaining 2014 | 576 |  | 576 |  |  |  |  |  |  |  |
2015 | 2,111 |  | 2,111 |  |  |  |  |  |  |  |
2016 | 1,803 |  | 1,803 |  |  |  |  |  |  |  |
2017 | 1,701 |  | 1,701 |  |  |  |  |  |  |  |
2018 | 1,694 |  | 1,694 |  |  |  |  |  |  |  |
Thereafter | 8,795 |  | 8,795 |  |  |  |  |  |  |  |
Total | $ 16,680 |  | $ 16,680 |  |  |  |  |  |  |  |

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