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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2014
Property, Plant and Equipment [Abstract] |
Property, Plant and Equipment | 11. Property, Plant and Equipment Balances of property, plant and equipment for 2013 have been revised from previously filed reports to correct an error that resulted in the misstatement of cost and accumulated depreciation and amortization by the same amount. The Company has determined that the error is immaterial to previously filed financial reports and, accordingly, has corrected the error by revising the previously disclosed amounts. The table below sets forth the revision and the components of property, plant and equipment.
(in thousands) | 2014 | 2013 revised balance | Error correction | As previously reported 2013 |  | Estimated useful life
Land and land improvements | $22,967 | $25,321 | ($1,760) | $27,081 |  | 25 years for improvements
Buildings | 225,094 | 236,963 | (3,886) | 240,849 |  | 25 to 40 years
Machinery and equipment | 940,764 | 980,055 | 77,018 | 903,037 |  | 10 years
Furniture and fixtures | 6,716 | 7,465 | 647 | 6,818 |  | 5 years
Computer and other equipment | 13,692 | 12,086 | (757) | 12,843 |  | 3 to 10 years
Software | 50,586 | 50,100 | (146) | 50,246 |  | 5 to 8 years
Property, plant and equipment, gross | 1,259,819 | 1,311,990 | 71,116 | 1,240,874 |  |
Accumulated depreciation and amortization | (864,706) | (893,160) | (71,116) | (822,044) |  |
Property, plant and equipment, net | $395,113 | $418,830 | $- | $418,830 |  |
Expenditures for maintenance and repairs are charged to income as incurred and amounted to $17.4 million in 2014, $17.5 million in 2013, and $17.0 million in 2012. Depreciation expense was $56.6 million in 2014, $57.2 million in 2013, $56.7 million in 2012. Software amortization is recorded in Selling, general, and administrative expense and was $6.2 million in 2014, $6.0 million in 2013 and $5.8 million in 2012. Capital expenditures, including purchased software, were $58.9 million in 2014, $64.5 million in 2013, and $37.2 million in 2012. Unamortized software cost was $13.8 million and $19.2 million as of December 31, 2014 and 2013, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13-14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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