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Consolidated Statements of Changes in Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-In Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Accumulated Other Comprehensive Loss [Member]
Beginning Balance at Dec. 31, 2014 $ 549,013 $ 797 $ 241,829 $ 907,751 $ (601,289) $ (75)
Beginning Balance, Shares at Dec. 31, 2014   79,652        
Net Income 18,646     18,646    
Other comprehensive income (loss), net of tax (8,894)         (8,894)
Dividend payments (18,449)     (18,449)    
Dividends accrued for unvested restricted stock units (7)     (7)    
Stock options exercised 961     (402) 1,363  
PSUs, RSUs and restricted stock vested (69)   (69) (767) 767  
Purchase of treasury stock (66,160)       (66,160)  
Income tax effect of stock compensation arrangements (1,593)   (1,593)      
Stock-based compensation expense 6,712   6,712      
Ending Balance at Dec. 31, 2015 480,160 $ 797 246,879 906,772 (665,319) (8,969)
Ending Balance, Shares at Dec. 31, 2015   79,652        
Net Income 35,229     35,229    
Other comprehensive income (loss), net of tax (3,219)         (3,219)
Dividend payments (17,583)     (17,583)    
Dividends accrued for unvested restricted stock units (48)     (48)    
Stock options exercised 4,717     (1,499) 6,216  
PSUs, RSUs and restricted stock vested (142)   (142) (929) 929  
Purchase of treasury stock (25,817)       (25,817)  
Income tax effect of stock compensation arrangements (475)   (475)      
Stock-based compensation expense 6,695   6,695      
Ending Balance at Dec. 31, 2016 $ 479,517 $ 797 252,957 921,942 (683,991) (12,188)
Ending Balance, Shares at Dec. 31, 2016 79,652 79,652        
Net Income $ 23,840     23,840    
Other comprehensive income (loss), net of tax 8,893         8,893
Dividend payments (17,368)     (17,368)    
Dividends accrued for unvested restricted stock units (37)     (37)    
Stock options exercised 13,412     (2,827) 16,239  
PSUs, RSUs and restricted stock vested (441)     (3,257) 2,816  
Purchase of treasury stock (17,348)       (17,348)  
Income tax effect of stock compensation arrangements 10   125 (115)    
Stock-based compensation expense 7,433   7,433      
Ending Balance at Dec. 31, 2017 $ 497,911 $ 797 $ 260,515 $ 922,178 $ (682,284) $ (3,295)
Ending Balance, Shares at Dec. 31, 2017 79,652 79,652