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Segment and Significant Customer Information (Details) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Revenue, Major Customer [Line Items] |  |  |  |
Concentration risk percentage |  | 10.00% |  |
Animal Health International, Inc. [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Concentration risk percentage | [1] | 42.00% | 38.00% | 38.00%
MWI Animal Health [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Concentration risk percentage | [2],[3] | 20.00% | 23.00% | 22.00%
[1] | During June 2015, Patterson Companies, Inc. (NASDAQ: PDCO) acquired Animal Health International, Inc.
[2] | Assumes that the November 2013 acquisition of IVESCO by MWI had occurred as of the beginning of the periods being reported
[3] | During March 2015, AmerisourceBergen Corporation (NYSE: ABC) acquired MWI Animal Health.

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