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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Common Stock | Additional Paid-in Capital | Retained Earnings | Non Controlling Interest | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 5 | $ 160,186 | $ 293,628 | $ (33) | $ 453,786
Balance (in shares) at Dec. 31, 2014 | 51,561,396 |  |  |  |
Increase (Decrease) in Stockholders' Equity Roll Forward |  |  |  |  |
Net income |  |  | 36,872 | 279 | 37,151
Issuance of shares to employees and directors |  | 2,096 |  |  | 2,096
Issuance of shares to employees and directors (in shares) | 114,744 |  |  |  |
Amortization of Restricted Stock Units |  | 1,050 |  |  | 1,050
Dividend equivalent Units accrued - Restricted Stock Units |  | 12 | (12) |  |
Distribution of non-controlling entities |  |  |  | (29) | (29)
Dividends declared |  |  | (10,589) |  | (10,589)
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 |  |  |  |

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