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Significant Accounting Policies (Net Income Per Share) (Details)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Significant Accounting Policies [Abstract]    
Weighted average shares outstanding used to compute basic earnings per share 11,419 12,744
Incremental shares issuable upon the assumed exercise of stock options   18
Unvested restricted stock 58 32
Shares used to compute diluted earnings per share 11,477 12,794