XML 46 R35.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 5 - Stockholders' Equity (Details Textual)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
$ / shares
shares
Mar. 31, 2017
USD ($)
May 07, 2018
shares
Dec. 31, 2017
shares
Nov. 06, 2016
USD ($)
Mar. 31, 2006
shares
Nov. 30, 2004
shares
Mar. 31, 2004
shares
Capital Units, Authorized 135,000,000              
Common Stock, Shares Authorized 100,000,000     100,000,000        
Common Stock, Shares, Outstanding, Ending Balance 82,039,917     83,253,588        
Preferred Stock, Shares Outstanding, Ending Balance 0              
Common Stock, Voting Rights, Votes Per Share 1              
Dividends, Common Stock, Total | $ $ 0 $ 0            
Treasury Stock, Value, Acquired, Cost Method | $ $ 19,607              
Common Stock, Capital Shares Reserved for Future Issuance 7,104,769              
March 2004 Authorization [Member]                
Stock Repurchase Program, Number of Shares Authorized to be Repurchased               2,000,000
The 2004-2006 Repurchase Authorization [Member]                
Stock Repurchase Program, Number of Shares Authorized to be Repurchased           5,000,000    
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased 279,200              
The 2016 Repurchase Authorization [Member]                
Stock Repurchase Program, Authorized Amount | $         $ 75,000      
Treasury Stock, Shares, Acquired 1,551,710              
Treasury Stock Acquired, Average Cost Per Share | $ / shares $ 12.64              
Treasury Stock, Value, Acquired, Cost Method | $ $ 19,600              
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ $ 49,500              
November 2004 Authorization [Member]                
Stock Repurchase Program, Number of Shares Authorized to be Repurchased             2,000,000  
Subsequent Event [Member]                
Common Stock, Shares Authorized     200,000,000          
Common Class A [Member]                
Common Stock, Shares Authorized 15,000,000     15,000,000        
Common Stock, Shares, Outstanding, Ending Balance 6,729,035     6,598,377        
Common Stock, Voting Rights, Votes Per Share 10              
Common Stock, Capital Shares Reserved for Future Issuance 1,703,064              
Common Class A [Member] | Subsequent Event [Member]                
Common Stock, Shares Authorized     25,000,000          
Blank Check Preferred Stock [Member]                
Preferred Stock, Shares Authorized 20,000,000