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5. GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill and other intangible assets |
Balance as of January 1, 2012 |  | 159,507 |
Goodwill acquired through the acquisition of Camarillo Imaging |  | 86 |
Goodwill acquired through the acquisition of West Coast Radiology |  | 5,395 |
Goodwill acquired through the acquisition of Advanced Medical Imaging of Stuart |  | 923 |
Goodwill acquired through the acquisition of Orthopedic Imaging |  | 302 |
Adjustments to our preliminary allocation of the purchase price of Raven Holdings U.S., Inc. |  | 7,895 |
Goodwill acquired through the acquisition of our controlling interest in Upper Chesapeake Imaging |  | 1,849 |
Goodwill acquired through the acquisition of Vanowen Radiology |  | 386 |
Goodwill acquired through the acquisition of our controlling interest in Clinical Radiology |  | 1,838 |
Goodwill acquired through the acquisition of Lenox Hill Radiology |  | 15,690 |
Balance as of December 31, 2012 |  | 193,871 |
Goodwill acquired through the acquisition of breast surgery practice in Mission Viejo, CA |  | 185 |
Adjustments to our preliminary allocation of the purchase price of Lenox Hill Radiology |  | (3,219 | )
Goodwill acquired through the acquisition of Park West |  | 2,047 |
Goodwill acquired through the acquisition of imaging center in Brooklyn, NY |  | 4,206 |
Goodwill associated with the sale of a wholly owned imaging center in Northfield, NJ |  | (1,000 | )
Goodwill acquired through the acquisition of South Valley Med Imaging |  | 305 |
Balance as of December 31, 2013 |  | 196,395 |
Goodwill acquired through the acquisition of Corinthian |  | 310 |
Goodwill acquired through the acquisition of Westchester Imaging |  | 231 |
Goodwill acquired through the acquisition of Garden State Radiology |  | 50 |
Goodwill acquired through the acquisition of Medical Imaging of Manhattan |  | 1,433 |
Goodwill acquired through the acquisition of Liberty Pacific |  | 1,288 |
Goodwill acquired through the acquisition of Moreno Valley |  | 362 |
Goodwill acquired through the acquisition of Hematology-Oncology |  | 235 |
Balance as of December 31, 2014 | $ | 200,304 |
Annual amortization expense |
| 2015 |  | 2016 |  | 2017 |  | 2018 |  | 2019 |  | Thereafter |  | Total |  | Weighted average amortization period remaining in years |
Management Service Contracts | $ | 2,315 |  | $ | 2,315 |  | $ | 2,315 |  | $ | 2,315 |  | $ | 2,315 |  | $ | 27,205 |  | $ | 38,781 |  |  | 16.8 |
Covenant not to compete contracts |  | 320 |  |  | 254 |  |  | 191 |  |  | 148 |  |  | 64 |  |  | – |  |  | 977 |  |  | 3.7 |
Customer relationships |  | 184 |  |  | 1 |  |  | – |  |  | – |  |  | – |  |  | – |  |  | 185 |  |  | 0.9 |
Developed technology and in-process R&D |  | 149 |  |  | 24 |  |  | – |  |  | – |  |  | – |  |  | – |  |  | 173 |  |  | 1.3 |
Trade Names* |  | – |  |  | – |  |  | – |  |  | – |  |  | – |  |  | 7,508 |  |  | 7,508 |  |  | – |
Total Annual Amortization | $ | 2,968 |  | $ | 2,594 |  | $ | 2,506 |  | $ | 2,463 |  | $ | 2,379 |  | $ | 34,713 |  | $ | 47,624 |  |  |  |

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