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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common stock | Additional Paid-in Capital | Accumulated Deficit | Treasury Stock
--- | --- | --- | --- | --- | ---
Beginning balance, shares outstanding at Dec. 31, 2014 |  | 18,512,000 |  |  |
Beginning Balance at Dec. 31, 2014 | $ 179,875 | $ 224 | $ 212,386 | $ (17,468) | $ (15,267)
Beginning Balance (Out-of-period Immaterial Adjustment [Member]) at Dec. 31, 2014 | 2,255 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 20,853 |  |  | 20,853 |
Isuuance of common stock, shares |  | 53,000 |  |  |
Issuance of common stock | $ 982 | $ 1 | 981 |  |
Exercise of stock options, shares | 110,000 | 43,000 |  |  |
Exercise of stock options | $ 0 | $ 0 | 0 |  |
Issuance of restricted common stock, shares |  | 43,000 |  |  |
Issuance of restricted common stock | 51 | $ 1 | 50 |  |
Cancellation and retirement of restricted common stock, shares |  | (75,000) |  |  |
Cancellation and retirement of restricted common stock | (1,608) | $ (1) | (1,607) |  |
Stock-based compensation expense | 4,195 |  | 4,195 |  |
Dividends on common stock | (1,819) |  | (1,819) |  |
Excess tax benefit on equity compensation | $ 64 |  | 64 |  |
Treasury stock acquired, shares | (1,927,665) | (1,928,000) |  |  |
Dividends on common stock | $ (44,999) |  |  |  | (44,999)
Ending balance, shares outstanding at Dec. 31, 2015 |  | 16,648,000 |  |  |
Ending Balance at Dec. 31, 2015 | 155,339 | $ 225 | 214,250 | 1,130 | (60,266)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 19,581 |  |  | 19,581 |
Isuuance of common stock, shares |  | 45,000 |  |  |
Issuance of common stock | $ 872 | $ 0 | 872 |  |
Exercise of stock options, shares | 112,000 | 48,000 |  |  |
Exercise of stock options | $ 1 | $ 1 | 0 |  |
Issuance of restricted common stock, shares |  | 18,000 |  |  |
Issuance of restricted common stock | 12 | $ 0 | 12 |  |
Cancellation and retirement of restricted common stock, shares |  | (118,000) |  |  |
Cancellation and retirement of restricted common stock | (889) | $ (1) | (888) |  |
Stock-based compensation expense | 3,526 |  | 3,526 |  |
Dividends on common stock | (2,492) |  | (2,492) |  |
Excess tax benefit on equity compensation | (216) |  | (216) |  |
Ending balance, shares outstanding at Dec. 31, 2016 |  | 16,641,000 |  |  |
Ending Balance at Dec. 31, 2016 | 175,734 | $ 225 | 215,064 | 20,711 | (60,266)
Ending Balance (Out-of-period Immaterial Adjustment [Member]) at Dec. 31, 2016 | 2,255 |  |  | 2,255 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net Income (Loss) | 37,193 |  |  | 37,193 |
Isuuance of common stock, shares |  | 68,000 |  |  |
Issuance of common stock | $ 1,638 | $ 1 | 1,637 |  |
Exercise of stock options, shares | 159,000 | 61,000 |  |  |
Exercise of stock options | $ 514 | $ 0 | 514 |  |
Issuance of restricted common stock, shares |  | 27,000 |  |  |
Issuance of restricted common stock | 0 | $ 0 | 0 |  |
Cancellation and retirement of restricted common stock, shares |  | (25,000) |  |  |
Cancellation and retirement of restricted common stock | (551) | $ 0 | (551) |  |
Stock-based compensation expense | 3,203 |  | 3,203 |  |
Dividends on common stock | $ (3,709) |  | (3,709) |  |
Treasury stock acquired, shares | (574,054) | (674,000) |  |  |
Dividends on common stock | $ (16,366) |  |  |  | (16,366)
Ending balance, shares outstanding at Dec. 31, 2017 |  | 16,098,000 |  |  |
Ending Balance at Dec. 31, 2017 | $ 197,656 | $ 226 | $ 216,158 | $ 57,904 | $ (76,632)

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