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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
ASSETS (note 7)    
Cash $ 14,732 $ 35,085 [1]
Receivables:    
Trade, net of allowance for doubtful accounts of $397 and $340, respectively 98,625 68,611 [1]
Other 1,473 1,187 [1]
Receivables, net 100,098 69,798 [1]
Inventories 74,667 71,068 [1]
Prepaid expenses 3,399 2,311 [1]
Income taxes receivable   203 [1]
Total current assets 192,896 178,465 [1]
Property, plant and equipment, net 43,039 39,273 [1]
Intangible assets 114,703 116,189 [1]
Other assets 5,012 5,214 [1]
Total assets 355,650 339,141 [1]
LIABILITIES AND STOCKHOLDERS' EQUITY    
Current installments of long-term debt 14,896 14,460 [1]
Current installments of other liabilities 1,134 1,038 [1]
Accounts payable 24,381 23,214 [1]
Deferred revenue   7,571 [1]
Accrued program costs 45,383 25,910 [1]
Accrued expenses and other payables 6,032 6,832 [1]
Income taxes payable 3,479  
Total current liabilities 95,305 79,025 [1]
Long-term debt, excluding current installments 43,527 51,917 [1]
Other liabilities, excluding current installments 5,774 5,955 [1]
Deferred income taxes 15,172 15,172 [1]
Total liabilities 159,778 152,069 [1]
Commitments and contingent liabilities       [1]
Stockholders' equity:    
Preferred stock, $.10 par value per share; authorized 400,000 shares; none issued       [1]
Common stock, $.10 par value per share; authorized 40,000,000 shares; issued 30,083,066 shares at March 31, 2012 and 29,845,047 shares at December 31, 2011 3,009 2,985 [1]
Additional paid-in capital 46,824 45,966 [1]
Accumulated other comprehensive loss (1,686) (2,250) [1]
Retained earnings 150,878 143,524 [1]
Total stockholders' equity including treasury stock 199,025 190,225 [1]
Less treasury stock, at cost, 2,260,996 shares at March 31, 2012 and at December 31, 2011 (3,153) (3,153) [1]
Total stockholders' equity 195,872 187,072 [1]
Total liabilities and stockholders' equity $ 355,650 $ 339,141 [1]
[1] The balance sheet at December 31, 2011 has been derived from the audited financial statements at that date.