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Statements of Stockholders' Equity (USD $)
In Thousands, unless otherwise specified
Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Accumulated Other Comprehensive Loss
Total
Balance at Dec. 31, 2011 $ 23,383 $ 10,454 $ 168,981 $ (37,884) $ (27,543) $ 137,391 [1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income     15,480     15,480
Dividends paid     (4,059)     (4,059)
Recognition of stock-based compensation expense   928       928
Employee withholding tax related to share-based compensation   (884)       (884)
Tax benefit realized from exercise of stock options and vesting of RSU's   922       922
Common stock issued - compensation plans 62 (62)        
Balance at Mar. 31, 2012 $ 23,445 $ 11,358 $ 180,402 $ (37,884) $ (27,543) $ 149,778
[1] Note: The balance sheet at December 31, 2011 has been derived from the audited financial statements at that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements.