Share-based Compensation - SSARs Rollforward (Details) (Stock Settled Stock Appreciation Rights (SSARS) [Member], USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013
Stock Settled Stock Appreciation Rights (SSARS) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Rights, Outstanding at beginning of period	606,834
Number of Rights, Granted	326,794
Number of Rights, Exercised	(183,948)
Number of Rights, Forfeited	(66,561)
Number of Rights, Outstanding at end of period	683,119
Number of Rights, Exercisable at end of period	419,121
Weighted Average Exercise Price, Outstanding at beginning of period	$ 6.91
Weighted Average Exercise Price, Granted	$ 7.58
Weighted Average Exercise Price, Exercised	$ 6.56
Weighted Average Exercise Price, Forfeited	$ 7.43
Weighted Average Exercise Price, Outstanding at end of period	$ 7.27
Weighted Average Exercise Price, Exercisable at end of period	$ 7.05
Remaining Contractual Term, Outstanding	7 years 4 months 21 days
Remaining Contractual Term, Exercisable	6 years 4 months 6 days
Aggregate Intrinsic Value, Outstanding at end of period	$ 1,826
Aggregate Intrinsic Value, Exercisable at end of period	$ 1,211