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Summary of Significant Accounting Policies (Detail Textuals) (USD $)
In Millions, except Per Share data, unless otherwise specified
 1 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
Feb. 19, 2013
Dec. 06, 2012
Dec. 11, 2012
Nov. 09, 2012
Sep. 06, 2012
Aug. 08, 2012
Jun. 06, 2012
May 02, 2012
Nov. 10, 2009
Mar. 29, 2013
Dec. 28, 2012
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
May 07, 2013
Subsequent event
Jun. 28, 2013
Subsequent event
Significant Accounting Policies [Line Items]                                                
Dividends declared per share (in dollars per share) $ 0.12   $ 2.00 $ 0.12   $ 0.12   $ 0.10       $ 0.12 $ 2.12 $ 0.12 $ 0.10 $ 0.10 $ 0.10 $ 0.10 $ 0.00 $ 2.46 $ 0.30 $ 0.00 $ 0.12  
Dividend paid in cash (in dollars per share)   $ 0.12     $ 0.12   $ 0.10     $ 0.12 $ 2.00                         $ 0.12
Withholding tax payable percentage                                       5.00%        
Percentage of stock dividend declared                 10.00%                              
Amount of re-capitalization of shareholders' equity from retained earnings to common stock                 $ 6.5                              
Description of stock dividend derived                 On November 10, 2009 the Boards of Directors declared a 10% stock dividend on December 7, 2009 to shareholders of record on November 20, 2009. As a result of this stock dividend, an entry of approximately $6.5 million was made to reflect the re-capitalization of shareholders' equity from retained earnings to common stock. This amount was derived from the quoted market value of the shares at the date of declaration ($6.10) times the number of shares issued as a result of the 10% stock dividend.