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Uncompleted Contracts (Tables)
 3 Months Ended
Sep. 30, 2013
Disclosure Customer Contracts Additional Information [Abstract]  
Gross and Net Amount of Uncompleted Contracts
Gross and net amounts on uncompleted contracts are as follows:
 
 
September 30,
2013
 
June 30,
2013
 
(in thousands)
Costs incurred and estimated earnings recognized on uncompleted contracts
$
848,334

 
$
802,588

Billings on uncompleted contracts
857,439

 
791,663

 
$
(9,105
)
 
$
10,925

Shown on balance sheet as:
 
 
 
Costs and estimated earnings in excess of billings on uncompleted contracts
$
66,678

 
$
73,773

Billings on uncompleted contracts in excess of costs and estimated earnings
75,783

 
62,848

 
$
(9,105
)
 
$
10,925