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Composition of Certain Financial Statement Captions (Tables)
 3 Months Ended
Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Property and Equipment
The following table summarizes property and equipment, and the related accumulated depreciation and amortization, at December 31, 2016 and September 30, 2016: 
 
December 31,
2016
 
September 30,
2016
 
(In thousands)
Property and equipment
$
130,029

 
$
126,760

Less: accumulated depreciation and amortization
(86,070
)
 
(81,638
)
 
$
43,959

 
$
45,122