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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Treasury Stock
Non-controlling Interest
Balance at beginning of period (in shares) at Dec. 31, 2015   155,146          
Balance at beginning of period at Dec. 31, 2015 $ 1,451,426 $ 2,045 $ 712,486 $ 531,621 $ (25,555) $ (9,298) $ 240,127
Increase (Decrease) in Stockholders' Equity              
Net loss (2,408)     (772)     (1,636)
Foreign currency translation adjustments 2,662       1,987   675
Change in marketable securities 191       143   48
Equity-based compensation expense 4,208   4,208        
Distributions to noncontrolling interest (5,012)           (5,012)
Common stock dividends ($0.15 per share during the three months 2016 and $0.075 per share during the three months 2017) (23,300)     (23,300)      
Common shares issued upon vesting of restricted stock units (in shares)   224          
Common shares issued upon vesting of restricted stock units 0 $ 3 (3)        
Common shares issued for employee stock purchase plan (in shares)   29          
Common shares issued for employee stock purchase plan 388 $ 0 388        
Treasury shares withheld (in shares)   (41)          
Treasury shares withheld (584)         (584)  
Balance at end of period (in shares) at Mar. 31, 2016   155,358          
Balance at end of period at Mar. 31, 2016 1,427,571 $ 2,048 717,079 507,549 (23,425) (9,882) 234,202
Balance at beginning of period (in shares) at Dec. 31, 2016   222,401          
Balance at beginning of period at Dec. 31, 2016 1,311,319 $ 2,802 1,036,786 317,270 (32,977) (12,562) 0
Increase (Decrease) in Stockholders' Equity              
Net loss (26,663)     (26,663)     0
Foreign currency translation adjustments 483       483   0
Change in marketable securities (318)       (318)   0
Equity-based compensation expense 5,701   5,701        
Common stock dividends ($0.15 per share during the three months 2016 and $0.075 per share during the three months 2017) (16,703)     (16,703)      
Common shares issued upon vesting of restricted stock units (in shares)   471          
Common shares issued upon vesting of restricted stock units 0 $ 5 (5)        
Common shares issued for employee stock purchase plan (in shares)   50          
Common shares issued for employee stock purchase plan 526 $ 1 525        
Treasury shares issued upon vesting of restricted stock units (in shares)   1          
Treasury shares issued upon vesting of restricted stock units (8)   (31)     23  
Treasury shares withheld (in shares)   (147)          
Treasury shares withheld (1,794)         (1,794)  
Balance at end of period (in shares) at Mar. 31, 2017   222,776          
Balance at end of period at Mar. 31, 2017 $ 1,272,543 $ 2,808 $ 1,042,976 $ 273,904 $ (32,812) $ (14,333) $ 0