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Share-based Compensation - Additional Information Related to SSARs (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 3,140 $ 2,119 $ 1,638
Stock Settled Stock Appreciation Rights [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense 792 611 595
Total intrinsic value of SSARs exercised 96 2,131 373
Total fair value of SSARs vesting $ 779 $ 636 $ 778