| Schedule of Segment Reporting Information, by Segment [Table Text Block] |
The Company reports in two operating segments: PBM and HCIT. The Company evaluates segment performance based upon revenue and gross profit. Financial information by segment is presented below (in thousands): | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | | 2012 | | 2011 | | 2012 | | 2011 | PBM: | | | | | | | | Revenue | $ | 3,150,755 |
| | $ | 1,256,369 |
| | $ | 6,493,029 |
| | $ | 3,511,148 |
| Cost of revenue | 2,940,060 |
| | 1,188,197 |
| | 6,094,664 |
| | 3,330,886 |
| Gross profit | $ | 210,695 |
| | $ | 68,172 |
| | $ | 398,365 |
| | $ | 180,262 |
| Total assets at September 30 | $ | 7,146,899 |
| | $ | 690,445 |
| | | | | HCIT: | | | | | | | | Revenue | $ | 40,025 |
| | $ | 30,921 |
| | $ | 117,551 |
| | $ | 85,833 |
| Cost of revenue | 15,829 |
| | 16,751 |
| | 48,132 |
| | 45,973 |
| Gross profit | $ | 24,196 |
| | $ | 14,170 |
| | $ | 69,419 |
| | $ | 39,860 |
| Total assets at September 30 | $ | 226,309 |
| | $ | 306,653 |
| | | | | Consolidated: | | | | | | | | Revenue | $ | 3,190,780 |
| | $ | 1,287,290 |
| | $ | 6,610,580 |
| | $ | 3,596,981 |
| Cost of revenue | 2,955,889 |
| | 1,204,948 |
| | 6,142,796 |
| | 3,376,859 |
| Gross profit | $ | 234,891 |
| | $ | 82,342 |
| | $ | 467,784 |
| | $ | 220,122 |
| Total assets at September 30 | $ | 7,373,208 |
| | $ | 997,098 |
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