CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Retained Earnings
Cost of Common Stock in Treasury
Accumulated Other Comprehensive Income (Loss), Net
Balance at Dec. 31, 2014 $ 614,473 $ 346,535 $ 302,242 $ (43,711) $ 9,407
Increase (Decrease) in Shareholders' Equity          
Net income 13,511   13,511    
Other comprehensive income (loss) 1,840       1,840
Issuance of 91,340 and 94,361 common shares under stock based compensation awards, including related tax effects for the three months ended on March 31, 2016 and 2015, respectively 1,970   (221) 2,191  
Cost of 269,667 and 104,661 shares of common stock acquired for treasury for the three months ended on March 31, 2016 and 2015, respectively (2,964)     (2,964)  
Common stock dividend ($0.180 and $0.164 per share for the three months ended on March 31, 2016 and 2015, respectively) (4,325)   (4,325)    
Balance at Mar. 31, 2015 624,505 346,535 311,207 (44,484) 11,247
Balance at Dec. 31, 2015 644,053 436,538 251,812 (50,852) 6,555
Increase (Decrease) in Shareholders' Equity          
Net income 13,818   13,818    
Other comprehensive income (loss) 2,744       2,744
Issuance of 91,340 and 94,361 common shares under stock based compensation awards, including related tax effects for the three months ended on March 31, 2016 and 2015, respectively 2,069   (111) 2,180  
Cost of 269,667 and 104,661 shares of common stock acquired for treasury for the three months ended on March 31, 2016 and 2015, respectively (8,005)     (8,005)  
Common stock dividend ($0.180 and $0.164 per share for the three months ended on March 31, 2016 and 2015, respectively) (4,706)   (4,706)    
Balance at Mar. 31, 2016 $ 649,973 $ 436,538 $ 260,813 $ (56,677) $ 9,299