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Note O - Commitments, Contingencies and Other (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 1 Months Ended 12 Months Ended 36 Months Ended 60 Months Ended 72 Months Ended 36 Months Ended 48 Months Ended 36 Months Ended 12 Months Ended 36 Months Ended 48 Months Ended 12 Months Ended 72 Months Ended
Dec. 31, 2011
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2013
Dec. 31, 2016
Dec. 31, 2023
Jun. 30, 2011
Sep. 30, 2010
Jun. 30, 2010
Sep. 30, 2007
Jun. 25, 2007
Dec. 31, 2011
Geographic Concentration Risk [Member]
Dec. 31, 2010
Geographic Concentration Risk [Member]
Dec. 31, 2009
Geographic Concentration Risk [Member]
Feb. 07, 2016
Executive B [Member]
Dec. 31, 2014
Executive B [Member]
Dec. 31, 2014
Executive B [Member]
Dec. 31, 2013
Executive A [Member]
Dec. 31, 2013
Executive C [Member]
Dec. 31, 2012
Executive D [Member]
Dec. 31, 2012
Executive F [Member]
Dec. 31, 2013
Executive A [Member]
Dec. 31, 2013
Executive C [Member]
Dec. 31, 2012
Executive D [Member]
Dec. 31, 2011
Executive D [Member]
Dec. 31, 2010
Executive D [Member]
Dec. 31, 2009
Executive D [Member]
Dec. 31, 2009
Executive F [Member]
Dec. 31, 2012
Executive F [Member]
Dec. 31, 2012
Executive F [Member]
Dec. 31, 2011
Four Executives [Member]
Dec. 31, 2010
Four Executives [Member]
Dec. 31, 2009
Four Executives [Member]
Dec. 31, 2014
Four Executives [Member]
Dec. 31, 2010
Supplier Concentration Risk [Member]
Dec. 31, 2009
Supplier Concentration Risk [Member]
Dec. 31, 2010
Supplier Concentration Risk A [Member]
Dec. 31, 2009
Supplier Concentration Risk A [Member]
Dec. 31, 2009
Supplier Concentration Risk B [Member]
Dec. 31, 2010
Customer Concentration Risk [Member]
Dec. 31, 2009
Customer Concentration Risk [Member]
Dec. 31, 2010
Customer Concentration Risk A [Member]
Dec. 31, 2009
Customer Concentration Risk A [Member]
Dec. 31, 2010
Customer Concentration Risk B [Member]
Dec. 31, 2009
Customer Concentration Risk B [Member]
Dec. 31, 2010
Customer Concentration Risk C [Member]
Dec. 31, 2009
Customer Concentration Risk C [Member]
Estimated Litigation Liability                           $ 2,750 $ 1,000                                                                            
Litigation Settlement                         1,968                                                                                
Loss Contingency, Estimate of Possible Loss 1,700           1,700   3,045         1,248   1,400                                                                          
Payments for Other Taxes 342                                                                                                        
Tax Penalties From Examination 1,367                                                                                                        
Loss Contingency Accrual, at Carrying Value 1,248           1,248                                                                                            
Future Employee Compensation   10,698 11,917 9,667 7,417 5,417                                                                                              
Other General Expense                     200                                                                                    
ShareBasedCompensation Arrangement With Employee Shares Issued (in Shares)           975,371                                                                                              
Share Based Compensation Arrangement With Employee Fair Value Of Shares Issued           40,000                                                                                              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                   four-year   seven                 three-year         five-year     three-year             five       four to five                          
Compensation Arrangement With Employee Pursuant To Election To Receive Additional Shares   7,026 8,250 6,125 4,000           40,000                                                                                    
Life Insurance, Corporate or Bank Owned, Amount 200           200                                                                                            
Notes Receivable, Related Parties, Noncurrent 4,090           4,090 3,849                 3,000                                                                        
RateOfDebtInstrumentDecreaseForgiveness 1/10th           1/10th                                                                                            
Period Of Debt Instrument Forgiveness           ten-year                                                                                              
Officers' Compensation                                           555           450 575 551 525 500 400 600 660                                    
Deferred Compensation Arrangement with Individual, Shares Issued (in Shares)                                             10,000 100,000 35,000 75,000 75,000                   112,500 70,500 56,250                            
Allocated Share-based Compensation Expense                                                                         2,281 1,581 1,675                            
Letters of Credit Outstanding, Amount 3,041           3,041                                                                                            
Costs and Expenses, Related Party             $ 1,552 $ 1,006 $ 760                                                                                        
Concentration Risk, Percentage                                   90.00% 89.00% 84.00%                                         13.00% 24.00% 12.00% 14.00% 11.00% 10.00% 11.00% 12.00% 14.00% 12.00% 13.00% 11.00% 10.00%