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Acquisition (Schedule of Allocation of purchase price consideration) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Jun. 30, 2016
Allocation of purchase price consideration (in thousands):    
Goodwill $ 22,139
Western State Design [Member]    
Allocation of purchase price consideration (in thousands):    
Accounts receivable 8,597  
Inventory 3,429  
Other assets 2,623  
Property, plant and equipment 879  
Intangible assets 6,464  
Accounts payable and accrued expenses (6,549)  
Customer deposits (4,247)  
Billings in excess of costs on uncompleted contracts (3,888)  
Total identifiable net assets 7,378  
Goodwill 22,139  
Total $ 29,447