Annual report pursuant to Section 13 and 15(d)

The Company and Its Accounting Policies (Details 2)

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The Company and Its Accounting Policies (Details 2) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Numerator:                      
Net income $ 4,096 $ 3,047 $ 2,615 $ 1,390 $ 429 $ 1,640 $ 5,468 $ 3,016 $ 11,148 $ 10,553 $ 5,874
Denominator:                      
Weighted common shares outstanding                 9,984 9,913 9,860
Share equivalent units ("SEUs") outstanding                 43 50 59
Weighted average shares and SEUs outstanding                 10,027 9,963 9,919
Basic income per share $ 0.41 $ 0.30 $ 0.26 $ 0.14 $ 0.04 $ 0.16 $ 0.55 $ 0.30 $ 1.11 $ 1.06 $ 0.59
Numerator:                      
Net income $ 4,096 $ 3,047 $ 2,615 $ 1,390 $ 429 $ 1,640 $ 5,468 $ 3,016 $ 11,148 $ 10,553 $ 5,874
Denominator:                      
Weighted average shares and SEUs outstanding                 10,027 9,963 9,919
Stock options outstanding                 24 34 38
Contingently issuable SEUs                   1 1
Weighted average common and potential common shares outstanding                 10,051 9,998 9,958
Diluted income per share $ 0.41 $ 0.30 $ 0.26 $ 0.14 $ 0.04 $ 0.16 $ 0.55 $ 0.30 $ 1.11 $ 1.06 $ 0.59