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Share-based Compensation - SSARs Rollforward (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period (4,181)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price $ 7.37
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 683,119
Number of Rights, Granted 119,120
Number of Rights, Exercised (331,318)
Number of Rights, Forfeited (149,905)
Number of Rights, Outstanding at end of period 316,835
Number of Rights, Exercisable at end of period 194,023
Weighted Average Exercise Price, Outstanding at beginning of period $ 7.27
Weighted Average Exercise Price, Granted $ 12.36
Weighted Average Exercise Price, Exercised $ 6.86
Weighted Average Exercise Price, Forfeited $ 8.51
Weighted Average Exercise Price, Outstanding at end of period $ 9.02
Weighted Average Exercise Price, Exercisable at end of period $ 8.46
Remaining Contractual Term, Outstanding 5 years 4 months 10 days
Remaining Contractual Term, Exercisable 5 years 1 month 28 days
Aggregate Intrinsic Value, Outstanding at end of period $ 1,388
Aggregate Intrinsic Value, Exercisable at end of period 959
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 296,192
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 8.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 5 years 4 months 2 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 1,321