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Property and Equipment
3 Months Ended
Dec. 31, 2017
Property Plant And Equipment [Abstract]  
Property and Equipment

6) Property and Equipment

Property and equipment are stated at cost. Depreciation is computed over the estimated useful lives of the depreciable assets using the straight-line method (in thousands):

 

 

 

December 31,

2017

 

 

September 30,

2017

 

Property and equipment

 

$

203,674

 

 

$

201,312

 

Less: accumulated depreciation

 

 

124,136

 

 

 

121,639

 

Property and equipment, net

 

$

79,538

 

 

$

79,673