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Detail of Selected Balance Sheet Accounts
 12 Months Ended
Sep. 30, 2013
Detail of Selected Balance Sheet Accounts

Allowance for Doubtful Accounts

Activity in our allowance for doubtful accounts consisted of the following (in thousands):

 

 

September 30,

 

 

2013

 

  

2012

 

Balance at beginning of year             

$

  1,399

  

  

$

  391

  

Increase in (decrease to) bad debt expense             

 

(544

)

  

 

  842

  

Deductions for uncollectible accounts written off, net of recoveries             

 

(142

)

  

 

  142

  

Increase (decrease) due to foreign currency translation             

 

(10

)

  

 

  24

  

Balance at end of year             

$

  703

  

  

$

  1,399

  

Inventories

The components of inventories are summarized below (in thousands):

 

 

September 30,

 

 

2013

 

  

2012

 

Raw materials, parts and subassemblies             

$

  30,097

  

  

$

  33,632

  

Work-in-progress             

 

  3,818

 

  

 

  6,422

  

Provision for excess and obsolete inventory             

 

(4,932

)

  

 

(7,137

)

Total inventories             

$

  28,983

  

  

$

  32,917

  

Cost and Estimated Earnings on Uncompleted Contracts

The components of costs and estimated earnings and related amounts billed on uncompleted contracts are summarized below (in thousands):

 

 

September 30,

 

 

2013

 

 

2012

 

Costs incurred on uncompleted contracts             

$

  697,760

 

 

$

  635,714

 

Estimated earnings             

 

  177,921

 

 

 

  168,480

 

 

 

  875,681

 

 

 

  804,194

 

Less: Billings to date             

 

  849,261

 

 

 

  754,604

 

Net underbilled position             

$

  26,420

 

 

$

  49,590

 

 

 

 

 

 

 

 

 

Included in the accompanying balance sheets under the following captions:

 

 

 

 

 

 

 

Costs and estimated earnings in excess of billings on uncompleted contracts – underbilled             

$

  86,621

 

 

$

  86,734

 

Billings in excess of costs and estimated earnings on uncompleted contracts – overbilled             

 

(60,201

)

 

 

(37,144

)

Net underbilled position             

$

  26,420

 

 

$

  49,590

 

Property, Plant and Equipment

Property, plant and equipment are summarized below (in thousands):

 

 

September 30,

 

 

Range of
Asset Lives

 

 

2013

 

  

2012

 

 

Land             

$

  24,022

  

  

$

  24,766

  

 

 

—

  

Buildings and improvements             

 

  79,746

 

  

 

  55,431

  

 

 

3 ‑ 39 Years

  

Machinery and equipment             

 

  72,217

 

  

 

  67,007

  

 

 

3 ‑ 15 Years

  

Furniture and fixtures             

 

  2,964

 

  

 

  2,940

  

 

 

3 ‑ 10 Years

  

Construction in process             

 

  48,300

 

  

 

  7,224

  

 

 

—

  

 

 

  227,249

 

  

 

  157,368

  

 

 

 

 

Less: Accumulated depreciation             

 

(82,660

) 

  

 

(78,716

) 

 

 

 

 

Total property, plant and equipment, net             

$

  144,589

  

  

$

  78,652

  

 

 

 

 

The increases in buildings and construction in process are primarily the result of construction of the new facilities in Houston, Texas, and Acheson, Alberta, Canada.

Included in property and equipment are assets under capital lease of $0.5 million and $1.8 million at September 30, 2013 and 2012, with related accumulated depreciation of $0.5 million and $1.0 million, respectively. Depreciation expense, including the depreciation of capital leases, was $8.5 million, $10.5 million and $10.6 million for fiscal years 2013, 2012 and 2011, respectively.

Warranty Accrual

Activity in our product warranty accrual consisted of the following (in thousands): 

 

September 30,

 

 

2013

 

  

2012

 

Balance at beginning of year             

$

  5,714

  

  

$

  4,603

  

Increase to warranty expense             

 

  4,060

 

  

 

  3,624

  

Deductions for warranty charges             

 

(4,359

)

  

 

(2,323

)

Increase (decrease) due to foreign currency translation             

 

  35

 

  

 

(190

)

Balance at end of year             

$

  5,450

  

  

$

  5,714