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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 |  | Physician |  | Life Sciences Europe |  | Healthcare |  | Total
Balance as of December 31, 2012 |  |  |  |  |  |  |  |  |  |  |
Gross goodwill | $ | 289,712 |  |  | $ | 150,619 |  |  | $ | 51,561 |  |  | $ | 3,753 |  |  | $ | 122,230 |  |  | $ | 617,875 |
Accumulated impairment | — |  |  | — |  |  | — |  |  | — |  |  | (121,717 | ) |  | (121,717 | )
| 289,712 |  |  | 150,619 |  |  | 51,561 |  |  | 3,753 |  |  | 513 |  |  | 496,158 |
Whitaker Acquisition (see Note 4) | — |  |  | — |  |  | 7,076 |  |  | — |  |  | — |  |  | 7,076 |
CyberCoders Acquisition (see Note 4) | — |  |  | 69,018 |  |  | — |  |  | — |  |  | — |  |  | 69,018 |
Divestiture - gross goodwill | — |  |  | — |  |  | — |  |  | — |  |  | (121,717 | ) |  | (121,717 | )
Divestiture - accumulated impairment | — |  |  | — |  |  | — |  |  | — |  |  | 121,717 |  |  | 121,717 |
Transfers | — |  |  | 513 |  |  | — |  |  | — |  |  | (513 | ) |  | — |
Translation adjustment | — |  |  | — |  |  | — |  |  | 811 |  |  | — |  |  | 811 |
Balance as of December 31, 2013 |  |  |  |  |  |  |  |  |  |  |
Gross goodwill | 289,712 |  |  | 220,150 |  |  | 58,637 |  |  | 4,564 |  |  | — |  |  | 573,063 |
Accumulated impairment | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
| 289,712 |  |  | 220,150 |  |  | 58,637 |  |  | 4,564 |  |  | — |  |  | 573,063 |
Translation adjustment | (1,761 | ) |  | (120 | ) |  | — |  |  | (485 | ) |  | — |  |  | (2,366 | )
Balance as of December 31, 2014 |  |  |  |  |  |  |  |  |  |  |
Gross goodwill | 287,951 |  |  | 220,030 |  |  | 58,637 |  |  | 4,079 |  |  | — |  |  | 570,697 |
Accumulated impairment | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
| $ | 287,951 |  |  | $ | 220,030 |  |  | $ | 58,637 |  |  | $ | 4,079 |  |  | $ | — |  |  | $ | 570,697 |
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 |  | $ | 109,861 |  |  | $ | 57,566 |  |  | $ | 52,295 |  |  | $ | 110,417 |  |  | $ | 41,564 |  |  | $ | 68,853 |
Contractor relations |  | 2 - 7 years |  | 42,946 |  |  | 35,010 |  |  | 7,936 |  |  | 42,998 |  |  | 30,737 |  |  | 12,261 |
Non-compete agreements |  | 2 - 7 years |  | 3,764 |  |  | 2,000 |  |  | 1,764 |  |  | 3,853 |  |  | 1,424 |  |  | 2,429 |
In-use software |  | 6 years |  | 18,900 |  |  | 3,366 |  |  | 15,534 |  |  | 18,900 |  |  | 263 |  |  | 18,637 |
Trademarks |  | 2 years |  | 400 |  |  | 185 |  |  | 215 |  |  | 400 |  |  | — |  |  | 400 |
|  |  |  | 175,871 |  |  | 98,127 |  |  | 77,744 |  |  | 176,568 |  |  | 73,988 |  |  | 102,580 |
Not subject to amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trademarks |  |  |  | 184,825 |  |  | — |  |  | 184,825 |  |  | 185,275 |  |  | — |  |  | 185,275 |
Total |  |  |  | $ | 360,696 |  |  | $ | 98,127 |  |  | $ | 262,569 |  |  | $ | 361,843 |  |  | $ | 73,988 |  |  | $ | 287,855 |
Schedule of Estimated Future Amortization Expense | Estimated amortization for each of the next five fiscal years and thereafter are as follows (in thousands):
2015 | $ | 21,242 |
2016 | 17,596 |
2017 | 12,866 |
2018 | 10,308 |
2019 | 8,492 |
Thereafter | 7,240 |
| $ | 77,744 |

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