Share-based Compensation (Details 2) (Stock Settled Stock Appreciation Rights (SSARS) [Member], USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Sep. 30, 2013
Stock Settled Stock Appreciation Rights (SSARS) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Rights Outstanding at April 1, 2013	683,119
Weighted Average Exercise Price Outstanding at April 1, 2013	$ 7.27
Number of Rights Granted,	119,120
Weighted Average Exercise Price Granted,	$ 12.36
Number of Rights Exercised	(292,576)
Weighted Average Exercise Price Exercised	$ 6.84
Number of Rights, Forfeited	(114,827)
Weighted Average Exercise Price, Forfeited	$ 8.32
Number of Rights Outstanding at September 30, 2013	394,836
Weighted Average Exercise Price Outstanding at September 30, 2013	$ 8.81
Remaining Contractual Term Outstanding at September 30, 2013	5 years 9 months 11 days
Aggregate Intrinsic Value Outstanding at September 30, 2013	$ 1,272
Number of Rights Exercisable at September 30, 2013	138,182
Weighted Average Exercise Price Exercisable at September 30, 2013	$ 7.94
Remaining Contractual Term Exercisable at September 30, 2013	5 years 9 months 4 days
Aggregate Intrinsic Value Exercisable at September 30, 2013	$ 556