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Business Acquisitions - Early Discovery Breakout of Definite-Lived Intangible Assets Acquired (Details) - Argenta and BioFocus [Member] - USD ($) $ in Thousands | Apr. 01, 2015 | Apr. 01, 2014
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Definite-Lived Intangible Assets |  |
Client relationships |  | $ 94,000
Backlog |  | 5,900
Trademark and trade names |  | 1,170
Leasehold interests |  | 1,000
Other intangible assets |  | 2,400
Total definite-lived intangible assets |  | $ 104,470
Client relationships |  |
Definite-Lived Intangible Assets |  |
Weighted average amortization life | 18 years |
Backlog |  |
Definite-Lived Intangible Assets |  |
Weighted average amortization life | 1 year |
Trademark and trade names |  |
Definite-Lived Intangible Assets |  |
Weighted average amortization life | 3 years |
Leasehold interests |  |
Definite-Lived Intangible Assets |  |
Weighted average amortization life | 13 years |
Other intangible assets |  |
Definite-Lived Intangible Assets |  |
Weighted average amortization life | 19 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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