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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Jun. 30, 2018
Sep. 30, 2017
Costs and estimated earnings on long-term contracts, progress billings $ 43,769 $ 64,099
Property, plant and equipment, net of accumulated depreciation 113,831 99,650
Intangible assets, net of accumulated amortization 87,494 73,879
Advance payments on long-term contracts, costs incurred $ 54,295 $ 59,772
Preferred Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Preferred Stock, Shares Authorized 10,000,000 10,000,000
Common Stock, Par or Stated Value Per Share $ 0.01 $ 0.01
Common Stock, Shares Authorized 50,000,000 50,000,000
Common stock, shares issued 30,534,786 30,468,824
Treasury stock, shares 4,623,958 4,635,622