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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member] | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2009 | $ 258 | $ 15,720 | $ 85,332 | $ 0 | $ 101,310
Balance (in shares) at Dec. 31, 2009 | 5,170,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 0 | 0 | 23,687 | 0 | 23,687
Stock-based compensation | 2 | 1,035 | 0 | 0 | 1,037
Stock-based compensation (in shares) | 24,000 |  |  |  |
Dividends declared | 0 | 0 | (1,195) | 0 | (1,195)
Other | 0 | (1,063) | 0 | 0 | (1,063)
Balance at Dec. 31, 2010 | 260 | 15,692 | 107,824 | 0 | 123,776
Balance (in shares) at Dec. 31, 2010 | 5,194,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income |  | 0 | 20,552 | 0 | 20,552
Stock-based compensation | 2 | 1,377 | 0 | 0 | 1,379
Stock-based compensation (in shares) | 53,000 |  |  |  |
Dividends declared | 0 | 0 | (1,415) | 0 | (1,415)
Change in fair value of interest rate swap agreements, net of tax | 0 | 0 | 0 | (692) | (692)
Balance at Dec. 31, 2011 | 262 | 17,069 | 126,961 | (692) | 143,600
Balance (in shares) at Dec. 31, 2011 | 5,247,000 |  |  |  | 5,246,527
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income |  | 0 | 21,294 | 0 | 21,294
Stock-based compensation | 3 | 1,124 | 0 | 0 | 1,127
Stock-based compensation (in shares) | 46,000 |  |  |  |
Dividends declared | 0 | 0 | (1,641) | 0 | (1,641)
Change in fair value of interest rate swap agreements, net of tax | 0 | 0 | 0 | (45) | (45)
Balance at Dec. 31, 2012 | $ 265 | $ 18,193 | $ 146,614 | $ (737) | $ 164,335
Balance (in shares) at Dec. 31, 2012 | 5,293,000 |  |  |  | 5,293,316

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