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PROPERTY, PLANT AND EQUIPMENT
12 Months Ended
Sep. 30, 2011
PROPERTY, PLANT AND EQUIPMENT 
PROPERTY, PLANT AND EQUIPMENT

NOTE 7—PROPERTY, PLANT AND EQUIPMENT

 

Significant components of property, plant and equipment are as follows:

 

September 30,

 

2011

 

2010

 

 

 

(in thousands)

 

 

 

 

 

Land and land improvements

 

$

15,963

 

$

15,821

 

Buildings and improvements

 

43,416

 

42,754

 

Machinery and other equipment

 

84,953

 

82,129

 

Leasehold improvements

 

5,707

 

4,829

 

Accumulated depreciation and amortization

 

(101,572

)

(98,064

)

 

 

$

48,467

 

$

47,469

 

 

Our provisions for depreciation of plant and equipment and amortization of leasehold improvements amounted to $7.7 million, $7.6 million and $9.2 million in 2011, 2010 and 2009, respectively. Generally, we use straight-line methods for real property over estimated useful lives ranging from 15 to 39 years or the term of the underlying lease for leasehold improvements.  We use accelerated methods (declining balance and sum-of-the-years-digits) for machinery and equipment over estimated useful lives ranging from 5 to 10 years.