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Detail Of Selected Balance Sheet Accounts | 12 Months Ended
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Sep. 30, 2012
Detail Of Selected Balance Sheet Accounts [Abstract] |
Detail Of Selected Balance Sheet Accounts | F. Detail of Selected Balance Sheet Accounts Allowance for Doubtful Accounts Activity in our allowance for doubtful accounts receivable consisted of the following (in thousands):
| September 30,
| 2012 | 2011
Balance at beginning of year | $ 391 | $ 907
Increase (decrease) to bad debt expense | 842 | (114)
Deductions for uncollectible accounts written off, net of recoveries | 142 | (394)
Increase (decrease) due to foreign currency translation | 24 | (8)
Balance at end of year | $ 1,399 | $ 391
Warranty Accrual Activity in our product warranty accrual consisted of the following (in thousands):
| September 30,
| 2012 | 2011
Balance at beginning of year | $ 4,603 | $ 5,929
Increase to warranty expense | 3,624 | 788
Deductions for warranty charges | (2,323) | (2,432)
Increase (decrease) due to foreign currency translation | (190) | 318
Balance at end of year | $ 5,714 | $ 4,603
In addition to our standard estimated warranty accrual, during fiscal year 2012, we recorded an additional $1.0 million of warranty expense related to the estimated costs to replace certain component parts which may be defective. Inventories The components of inventories are summarized below (in thousands):
| September 30,
| 2012 | 2011
Raw materials, parts and subassemblies | $ 33,632 | $ 38,400
Work-in-progress | 6,422 | 5,892
Provision for excess and obsolete inventory | (7,137) | (7,652)
Total inventories | $ 32,917 | $ 36,640
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,
| 2012 | 2011
Costs incurred on uncompleted contracts | $ 635,714 | $ 475,525
Estimated earnings | 168,480 | 131,367
| 804,194 | 606,892
Less: Billings to date | 754,604 | 599,847
Net underbilled position | $ 49,590 | $ 7,045
Included in the accompanying balance sheets under the following captions: |  |
Costs and estimated earnings in excess of billings on uncompleted contracts – underbilled | $ 86,734 | $ 51,568
Billings in excess of costs and estimated earnings on uncompleted contracts – overbilled | (37,144) | (44,523)
Net underbilled position | $ 49,590 | $ 7,045
Property, Plant and Equipment Property, plant and equipment are summarized below (in thousands):
| September 30, | Range of
| 2012 | 2011 | Asset Lives
Land | $ 24,766 | $ 7,640 | —
Buildings and improvements | 55,431 | 54,321 | 3 - 39 Years
Machinery and equipment | 67,007 | 62,456 | 3 - 15 Years
Furniture and fixtures | 2,940 | 3,203 | 3 - 10 Years
Construction in process | 7,224 | 2,625 | —
| 157,368 | 130,245 |
Less: Accumulated depreciation | (78,716) | (70,608) |
Total property, plant and equipment, net | $ 78,652 | $ 59,637 |
The increases in land and construction in process are primarily the result of construction of facilities in Houston, Texas, and Acheson, Alberta, Canada. Included in property and equipment are assets under capital lease of $1.8 million and $2.9 million at September 30, 2012 and 2011, with related accumulated depreciation of $1.0 million and $1.4 million, respectively. Depreciation expense, including the depreciation of capital leases, was $10.5 million, $10.6 million and $9.2 million for fiscal years 2012, 2011 and 2010, respectively.

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