Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Additional Information (Detail)

v2.4.0.6
Property, Plant and Equipment - Additional Information (Detail) (USD $)
1 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Property, Plant, and Equipment Disclosure [Line Items]        
Depreciation expense   $ 12,300,000 $ 12,500,000 $ 12,600,000
Capital Lease Obligations   800,000    
Accumulated depreciation on Capital Lease   135,823,000 125,708,000  
Impairment Charges Land Held For Use 5,600,000 1,200,000    
Capital Lease
       
Property, Plant, and Equipment Disclosure [Line Items]        
Depreciation expense   53,000 53,000 53,000
Accumulated depreciation on Capital Lease   $ 291,000 $ 238,000 $ 185,000