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Shareholders' Equity - Summary of dividends declared (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Declaration Date May 3, 2013
 
Stockholders Equity Note [Line Items]  
Declaration Date May 03, 2013
Per Share Dividend $ 0.150
Record Date May 15, 2013
Total Amount (In thousands) $ 3,016
Payment Date May 24, 2013
Declaration Date July 26, 2013
 
Stockholders Equity Note [Line Items]  
Declaration Date Jul. 26, 2013
Per Share Dividend $ 0.170
Record Date Aug. 12, 2013
Total Amount (In thousands) 3,433
Payment Date Aug. 23, 2013
Declaration Date October 28, 2013
 
Stockholders Equity Note [Line Items]  
Declaration Date Oct. 28, 2013
Per Share Dividend $ 0.170
Record Date Nov. 08, 2013
Total Amount (In thousands) 3,432
Payment Date Nov. 22, 2013
Declaration Date January 30, 2014
 
Stockholders Equity Note [Line Items]  
Declaration Date Jan. 30, 2014
Per Share Dividend $ 0.170
Record Date Feb. 12, 2014
Total Amount (In thousands) $ 3,432
Payment Date Feb. 21, 2014