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Share-based Compensation - SSARs Rollforward (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2015
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period | shares (13,333)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price | $ / shares $ 7.46
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 | shares 320,236
Number of Rights, Granted | shares 115,020
Number of Rights, Exercised | shares (16,078)
Number of Rights, Forfeited | shares (11,835)
Number of Rights, Outstanding at end of period | shares 394,010
Number of Rights, Exercisable at end of period | shares 286,849
Weighted Average Exercise Price, Outstanding at beginning of period | $ / shares $ 9.05
Weighted Average Exercise Price, Granted | $ / shares 14.41
Weighted Average Exercise Price, Exercised | $ / shares 7.75
Weighted Average Exercise Price, Forfeited | $ / shares 7.46
Weighted Average Exercise Price, Outstanding at end of period | $ / shares 10.76
Weighted Average Exercise Price, Exercisable at end of period | $ / shares $ 9.63
ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms 4 years 9 months
SharebasedCompensationArrangementbySharebasedPaymentAwardVestedandExpectedtoVestOutstandingRemainingContractualTerm 4 years 4 months
Aggregate Intrinsic Value, Outstanding at end of period | $ $ 388
Aggregate Intrinsic Value, Exercisable at end of period | $ $ 388
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | shares 375,666
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ / shares $ 10.61
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 4 years 9 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $ $ 388