XML 67 R45.htm IDEA: XBRL DOCUMENT v3.6.0.2
Note 4 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
May 29, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 1,550,000        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 619,427        
Maximum Number of Shares of Class A Common Stock Awarded to any Participant in the Incentive Plan in any Calendar Year 200,000        
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation $ 0 $ 0 $ 834    
Payments Related to Tax Withholding for Share-based Compensation $ 1,142 $ 2,280 $ 832    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 265,000 330,000 642,000   777,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 3,500 $ 6,500 $ 2,900    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 3,600        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 30 days        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0 0 0    
Services Provided [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 158,015        
Performance Shares [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 107,453        
Performance Shares [Member] | Related to Performance for Year Ended December 31, 2016 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 29,959        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 0        
Performance Shares [Member] | Related Performance for Year Ended December 31, 2017 and 2018 [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 77,494        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 0        
Common Class A [Member]          
Shares Paid for Tax Withholding for Share Based Compensation 55,429 84,138 39,676    
Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased $ 20.61 $ 27.10 $ 20.97    
Payments Related to Tax Withholding for Share-based Compensation $ 1,100 $ 2,300 $ 800    
Salaries Wages And Related Expenses [Member]          
Allocated Share-based Compensation Expense 1,200 1,300 1,300    
General Supplies and Expenses [Member]          
Allocated Share-based Compensation Expense $ 200 $ 200 $ 100    
Third Amendment [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       750,000  
Second Amendment [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       800,000