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Segment Reporting (Segment Reporting Information) (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 segment | Sep. 30, 2011
Segment Reporting [Abstract] |  |  |  |  |  |  |  |
Reportable segments (in number of segments) |  |  |  |  | 5 |  |  |
Revenues: |  |  |  |  |  |  |  |
Total Revenues | $ 388,283,000 |  | $ 162,370,000 |  | $ 838,046,000 |  | $ 435,491,000 |
Gross Profit: |  |  |  |  |  |  |  |
Total Gross Profit | 119,039,000 |  | 54,528,000 |  | 263,041,000 |  | 146,476,000 |
Operating Income (Loss): |  |  |  |  |  |  |  |
Total Operating Income | 36,496,000 |  | 13,736,000 |  | 66,097,000 |  | 30,930,000 |
Apex |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |
Acquisition costs expensed | 700,000 |  |  |  | 9,400,000 |  |  |
Revenues: |  |  |  |  |  |  |  |
Total Revenues | 202,664,000 |  | 0 |  | 301,167,000 |  | 0 |
Gross Profit: |  |  |  |  |  |  |  |
Total Gross Profit | 56,934,000 |  | 0 |  | 83,917,000 |  | 0 |
Operating Income (Loss): |  |  |  |  |  |  |  |
Total Operating Income | 16,563,000 | [1] | 0 | [1] | 14,594,000 | [1] | 0 | [1]
Oxford |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Total Revenues | 88,104,000 |  | 70,074,000 |  | 254,970,000 |  | 195,512,000 |
Gross Profit: |  |  |  |  |  |  |  |
Total Gross Profit | 31,250,000 |  | 25,113,000 |  | 90,266,000 |  | 69,483,000 |
Operating Income (Loss): |  |  |  |  |  |  |  |
Total Operating Income | 13,251,000 |  | 9,038,000 |  | 36,007,000 |  | 23,014,000 |
Life Sciences |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Total Revenues | 40,646,000 |  | 41,820,000 |  | 122,506,000 |  | 114,403,000 |
Gross Profit: |  |  |  |  |  |  |  |
Total Gross Profit | 14,002,000 |  | 14,163,000 |  | 41,649,000 |  | 39,025,000 |
Operating Income (Loss): |  |  |  |  |  |  |  |
Total Operating Income | 3,020,000 |  | 3,026,000 |  | 8,291,000 |  | 7,378,000 |
Healthcare |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Total Revenues | 29,390,000 |  | 27,091,000 |  | 82,796,000 |  | 68,671,000 |
Gross Profit: |  |  |  |  |  |  |  |
Total Gross Profit | 8,483,000 |  | 7,458,000 |  | 23,622,000 |  | 19,242,000 |
Operating Income (Loss): |  |  |  |  |  |  |  |
Total Operating Income | 455,000 |  | (522,000) |  | 936,000 |  | (3,423,000) |
Physician |  |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Total Revenues | 27,479,000 |  | 23,385,000 |  | 76,607,000 |  | 56,905,000 |
Gross Profit: |  |  |  |  |  |  |  |
Total Gross Profit | 8,370,000 |  | 7,794,000 |  | 23,587,000 |  | 18,726,000 |
Operating Income (Loss): |  |  |  |  |  |  |  |
Total Operating Income | $ 3,207,000 |  | $ 2,194,000 |  | $ 6,269,000 |  | $ 3,961,000 |
[1] | Three Months Ended Nine Months Ended September 30, September 30, 2012 2011 2012 2011Revenues: Apex$202,664 $— $301,167 $—Oxford88,104 70,074 254,970 195,512Life Sciences40,646 41,820 122,506 114,403Healthcare29,390 27,091 82,796 68,671Physician27,479 23,385 76,607 56,905 $388,283 $162,370 $838,046 $435,491Gross Profit: Apex$56,934 $— $83,917 $—Oxford31,250 25,113 90,266 69,483Life Sciences14,002 14,163 41,649 39,025Healthcare8,483 7,458 23,622 19,242Physician8,370 7,794 23,587 18,726 $119,039 $54,528 $263,041 $146,476Operating Income: Apex (1)$16,563 $— $14,594 $—Oxford13,251 9,038 36,007 23,014Life Sciences3,020 3,026 8,291 7,378Healthcare455 (522) 936 (3,423)Physician3,207 2,194 6,269 3,961 $36,496 $13,736 $66,097 $30,930_____ (1) Apex operating income includes acquisition relate

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