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Property, Plant and Equipment
 12 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment

6.    Property, Plant and Equipment

Property, plant and equipment were as follows as of September 30, 2018 and 2017 (in thousands):

 

 

 

 

 

 

 

 

 

September 30, 

 

    

2018

    

2017

Buildings and land

 

$

47,745

 

$

46,608

Computer equipment and software

 

 

56,982

 

 

55,352

Machinery and equipment

 

 

55,794

 

 

48,647

Furniture and fixtures

 

 

4,842

 

 

4,034

Leasehold improvements

 

 

19,433

 

 

18,045

Capital projects in progress

 

 

5,796

 

 

2,761

 

 

 

190,592

 

 

175,447

Less: accumulated depreciation and amortization

 

 

(130,604)

 

 

(118,466)

Property, plant and equipment, net

 

$

59,988

 

$

56,981

 

Depreciation expense was $12.5 million, $10.1 million and $12.2 million, respectively, for the fiscal years ended September 30, 2018, 2017 and 2016. The Company recorded $0.9 million of additions to property, plant and equipment for which cash payments had not yet been made as of September 30, 2018.