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Goodwill and Other Identifiable Intangible Assets (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Dec. 02, 2017
Mar. 04, 2017
Schedule of goodwill attributable to each business segment    
Goodwill, Beginning $ 101,334 $ 73,996
Goodwill acquired   27,444
Goodwill acquired, net 49,256  
Foreign currency translation 2,291 (106)
Goodwill, Ending 152,881 101,334
Architectural Glass    
Schedule of goodwill attributable to each business segment    
Goodwill, Beginning 25,956 25,639
Goodwill acquired   0
Goodwill acquired, net 0  
Foreign currency translation 50 317
Goodwill, Ending 26,006 25,956
Architectural Framing Systems    
Schedule of goodwill attributable to each business segment    
Goodwill, Beginning 63,701 36,680
Goodwill acquired   27,444
Goodwill acquired, net 49,256  
Foreign currency translation 2,241 (423)
Goodwill, Ending 115,198 63,701
Architectural Services    
Schedule of goodwill attributable to each business segment    
Goodwill, Beginning 1,120 1,120
Goodwill acquired   0
Goodwill acquired, net 0  
Foreign currency translation 0 0
Goodwill, Ending 1,120 1,120
Large-Scale Optical    
Schedule of goodwill attributable to each business segment    
Goodwill, Beginning 10,557 10,557
Goodwill acquired   0
Goodwill acquired, net 0  
Foreign currency translation 0 0
Goodwill, Ending $ 10,557 $ 10,557