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6. Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2018
Earnings per share:  
Schedule of computation of basic and diluted earnings per share

The following table reconciles the number of shares used in the computations of basic and diluted earnings per share for the three-month periods ended March 31, 2018 and 2017:

 

    Three Months Ended  
    March 31,  
    2018     2017  
    (In thousands)  
Weighted average number of common shares outstanding during the period used to compute basic earnings per share     21,576       23,517  
Incremental common shares attributable to exercise of outstanding options and warrants     4,088       4,706  
Weighted average number of common shares used to compute diluted earnings per share     25,664       28,223