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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Dec. 31, 2011
Current assets:        
Cash and cash equivalents $ 27,370 $ 31,055 $ 50,089 $ 33,207
Restricted cash 20,601 21,314    
Trade accounts receivable, less allowance for doubtful accounts of $10,977 and $13,543 at June 30, 2013 and December 31, 2012, respectively 90,828 107,312    
Inventories 94,941 83,373    
Deferred income taxes 33,664 33,450    
Prepaid expenses and other current assets 28,993 34,079    
Total current assets 296,397 310,583    
Property, plant and equipment, net 55,166 53,835    
Patents and other intangible assets, net 6,857 7,290    
Goodwill 72,758 74,388    
Deferred income taxes 19,205 18,881    
Other long-term assets 9,067 7,920    
Total assets 459,450 472,897    
Current liabilities:        
Trade accounts payable 18,894 22,575    
Other current liabilities 52,679 39,610    
Total current liabilities 71,573 62,185    
Long-term debt 20,000 20,000    
Deferred income taxes 12,326 11,456    
Other long-term liabilities 10,324 11,424    
Total liabilities 114,223 105,065    
Contingencies (Note 16)          
Shareholders' equity:        
Common shares $0.10 par value; 50,000,000 shares authorized; 18,494,258 and 19,339,329 issued and outstanding as of June 30, 2013 and December 31, 2012, respectively 1,849 1,934    
Additional paid-in capital 225,148 246,306    
Retained earnings 117,030 114,847    
Accumulated other comprehensive income 1,200 4,745    
Total shareholders' equity 345,227 367,832    
Total liabilities and shareholders' equity $ 459,450 $ 472,897