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Composition of Certain Financial Statement Captions (Tables)
 3 Months Ended
Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Property and Equipment
The following table summarizes property and equipment, and the related accumulated depreciation and amortization, at December 31, 2018 and September 30, 2018:
 
December 31,
2018
 
September 30,
2018
 
(In thousands)
Property and equipment
$
159,956

 
$
156,154

Less: accumulated depreciation and amortization
(113,092
)
 
(107,317
)
 
$
46,864

 
$
48,837