CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Allowance for Doubtful Accounts Receivable, Current	$ 1,563	$ 1,122
Costs and estimated earnings on long-term contracts, progress billings	25,309	30,041
Advance payments on long-term contracts, costs incurred	$ 49,779	$ 44,110
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	30,358,864	30,247,512
Treasury stock, shares	4,542,214	4,040,532