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Property and Equipment, net
12 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
Property and Equipment, net
Property and Equipment, net
Property and equipment, net consisted of the following:
 
 
 
Depreciable
Lives (in years)
 
September 30,
2018
 
September 30,
2017
Land
 
 
$
3,189

 
$
3,189

Building and building improvements
 
30-35
 
81,304

 
79,712

Leasehold improvements
 
1-28
 
54,310

 
41,825

Training equipment
 
3-10
 
95,795

 
94,817

Office and computer equipment
 
3-10
 
36,714

 
36,458

Curriculum development
 
5
 
19,692

 
19,713

Software developed for internal use
 
1-5
 
12,251

 
11,772

Vehicles
 
5
 
1,400

 
1,269

Construction in progress
 
 
4,250

 
1,599

 
 
 
 
308,905

 
290,354

Less accumulated depreciation and amortization
 
 
 
(194,057
)
 
(183,690
)
 
 
 
 
$
114,848

 
$
106,664


Depreciation expense related to our property and equipment was $16.0 million, $16.9 million and $17.3 million for the years ended September 30, 2018, 2017 and 2016, respectively. Amortization expense related to curriculum development and software developed for internal use was $0.5 million, $0.7 million and $1.1 million for the years ended September 30, 2018, 2017 and 2016, respectively.
The following amounts, which are included in the above table, represent assets financed by financing obligations:
 
 
September 30,
2018
 
September 30,
2017
Assets financed by financing obligations, gross
 
$
45,816

 
$
45,816

Less accumulated depreciation and amortization
 
(11,526
)
 
(8,844
)
Assets financed by financing obligation, net
 
$
34,290

 
$
36,972