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Reconciliation of Changes in Contingent Earn-Out Obligations (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended |
|---|---|
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Dec. 31, 2013
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|
| Business Combination Segment Allocation [Line Items] | |
| Beginning balance | $ 292,042 |
| Contingent earn-out obligations associated with acquisitions | 12,152 |
| Other tax-related adjustments | 2,667 |
| Ending balance | 28,058 |
|
HealthCare Partners (HCP)
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|
| Business Combination Segment Allocation [Line Items] | |
| Remeasurement of fair value | (56,977) |
| Payments of the contingent earn-outs | (205,704) |
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All Others
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|
| Business Combination Segment Allocation [Line Items] | |
| Remeasurement of fair value | (15,742) |
| Payments of the contingent earn-outs | $ (380) |