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Intangible Asset Impairment
9 Months Ended
Jan. 28, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Impairment
Intangible Asset Impairment

In the first quarter of fiscal 2006, we extended our exclusive North American distribution relationship with Sirona Dental Systems for Sirona’s CEREC 3D dental restorative system. At that time, we paid a $100,000 distribution fee to extend the existing exclusive relationship for at least a 10-year period beginning in 2007. This distribution fee has been accounted for as an intangible asset in our Dental segment that has been amortized since October 2007.
    
Based on our November 2016 decision not to extend sales exclusivity for the full Sirona portfolio of products, we recorded a pre-tax non-cash impairment charge of $36,312 in our Dental segment in the third quarter fiscal 2017, related to the distribution fee associated with the CEREC product component of this arrangement. This charge was recorded within operating expenses in the condensed consolidated statements of income and other comprehensive income.