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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Retained Earnings
Accumulated Other Comprehensive Loss
Non Controlling Interest
Total
Balance at Dec. 31, 2015 $ 5 $ 163,344 $ 319,899   $ 217 $ 483,465
Balance (in shares) at Dec. 31, 2015 51,676,140          
Increase (Decrease) in Stockholders' Equity Roll Forward            
Net income     26,723   1,002 27,725
Issuance of shares to employees and directors   2,133       2,133
Issuance of shares to employees and directors (in shares) 108,102          
Amortization of Restricted Stock Units   1,627       1,627
Dividend equivalent Units accrued - Restricted Stock Units   23 (23)      
Repurchase of stock   (4,999)       (4,999)
Repurchase of stock (in shares) (207,800)          
Dividends declared     (11,381)     (11,381)
Balance at Dec. 31, 2016 $ 5 162,128 335,218   1,219 498,570
Balance (in shares) at Dec. 31, 2016 51,576,442          
Increase (Decrease) in Stockholders' Equity Roll Forward            
Net income     72,354   4,496 76,850
Issuance of shares to employees and directors   2,210       2,210
Issuance of shares to employees and directors (in shares) 88,661          
Amortization of Restricted Stock Units   1,126       1,126
Dividend equivalent Units accrued - Restricted Stock Units   37 (37)      
Repurchase of stock   (4,999)       (4,999)
Repurchase of stock (in shares) (216,350)          
Dividends declared     (11,574)     (11,574)
Balance at Dec. 31, 2017 $ 5 160,502 395,961   5,715 562,183
Balance (in shares) at Dec. 31, 2017 51,448,753          
Increase (Decrease) in Stockholders' Equity Roll Forward            
Net income     77,461   10,132 87,593
Foreign currency translation adjustments, net of tax       $ (908)   (908)
Issuance of shares to employees and directors   2,245       2,245
Issuance of shares to employees and directors (in shares) 91,911          
Amortization of Restricted Stock Units   1,253       1,253
Dividend equivalent Units accrued - Restricted Stock Units   48 (48)      
Repurchase of stock   (20,000)       (20,000)
Repurchase of stock (in shares) (825,146)          
Distribution of non-controlling entities         (13,084) (13,084)
Dividends declared     (12,299)     (12,299)
Balance at Dec. 31, 2018 $ 5 $ 144,048 $ 461,075 $ (908) $ 2,763 $ 606,983
Balance (in shares) at Dec. 31, 2018 50,715,518