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Goodwill and Identifiable Assets (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The changes in the carrying amount of goodwill for the years ended December 31, 2014 and 2013 are as follows (in thousands):
| Apex |  | Oxford |  | Life Sciences Europe |  | Total
Balance as of December 31, 2012 |  |  |  |  |  |  |
Gross goodwill | $ | 289,712 |  |  | $ | 150,619 |  |  | $ | 3,753 |  |  | $ | 444,084 |
Accumulated impairment | — |  |  | — |  |  | — |  |  | — |
| 289,712 |  |  | 150,619 |  |  | 3,753 |  |  | 444,084 |
CyberCoders Acquisition (see Note 4) | — |  |  | 69,018 |  |  | — |  |  | 69,018 |
Transfers | — |  |  | 513 |  |  | — |  |  | 513 |
Translation adjustment | — |  |  | — |  |  | 811 |  |  | 811 |
Balance as of December 31, 2013 |  |  |  |  |  |  |
Gross goodwill | 289,712 |  |  | 220,150 |  |  | 4,564 |  |  | 514,426 |
Accumulated impairment | — |  |  | — |  |  | — |  |  | — |
| 289,712 |  |  | 220,150 |  |  | 4,564 |  |  | 514,426 |
Translation adjustment | (1,761 | ) |  | (120 | ) |  | (485 | ) |  | (2,366 | )
Balance as of December 31, 2014 |  |  |  |  |  |  |
Gross goodwill | 287,951 |  |  | 220,030 |  |  | 4,079 |  |  | 512,060 |
Accumulated impairment | — |  |  | — |  |  | — |  |  | — |
| $ | 287,951 |  |  | $ | 220,030 |  |  | $ | 4,079 |  |  | $ | 512,060 |
Schedule of Acquired Intangible Assets | As of December 31, 2014 and 2013, the Company had the following acquired intangible assets (in thousands):
|  |  |  | 2014 |  | 2013
|  | Estimated Useful Life |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Customer relations |  | 3 months – 10 years |  | $ | 101,141 |  |  | $ | 53,434 |  |  | $ | 47,707 |  |  | $ | 101,697 |  |  | $ | 38,930 |  |  | $ | 62,767 |
Contractor relations |  | 2 - 7 years |  | 39,332 |  |  | 32,021 |  |  | 7,311 |  |  | 39,384 |  |  | 28,321 |  |  | 11,063 |
Non-compete agreements |  | 2 - 7 years |  | 3,654 |  |  | 1,922 |  |  | 1,732 |  |  | 3,743 |  |  | 1,362 |  |  | 2,381 |
In-use software |  | 6 years |  | 18,900 |  |  | 3,366 |  |  | 15,534 |  |  | 18,900 |  |  | 263 |  |  | 18,637 |
|  |  |  | 163,027 |  |  | 90,743 |  |  | 72,284 |  |  | 163,724 |  |  | 68,876 |  |  | 94,848 |
Not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  | 178,325 |  |  | — |  |  | 178,325 |  |  | 178,775 |  |  | — |  |  | 178,775 |
Total |  |  |  | $ | 341,352 |  |  | $ | 90,743 |  |  | $ | 250,609 |  |  | $ | 342,499 |  |  | $ | 68,876 |  |  | $ | 273,623 |
Schedule of Estimated Future Amortization Expense | Estimated amortization for each of the next five fiscal years and thereafter are as follows (in thousands):
2015 | $ | 19,381 |
2016 | 16,366 |
2017 | 12,078 |
2018 | 9,669 |
2019 | 7,972 |
Thereafter | 6,818 |
| $ | 72,284 |

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