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Share-based Compensation - SSARs Rollforward (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2017
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 (115,307)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price | $ / shares $ 12.96
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 794,365
Number of Rights, Granted | shares 694,231
Number of Rights, Exercised | shares (136,035)
Number of Rights, Forfeited | shares (142,276)
Number of Rights, Outstanding at end of period | shares 1,094,978
Number of Rights, Exercisable at end of period | shares 341,434
Weighted Average Exercise Price, Outstanding at beginning of period | $ / shares $ 10.06
Weighted Average Exercise Price, Granted | $ / shares 10.77
Weighted Average Exercise Price, Exercised | $ / shares 8.07
Weighted Average Exercise Price, Forfeited | $ / shares 10.10
Weighted Average Exercise Price, Outstanding at end of period | $ / shares 10.44
Weighted Average Exercise Price, Exercisable at end of period | $ / shares $ 10.03
Remaining Contractual Term, Outstanding 5 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Vested and Expected to Vest, Outstanding, Remaining Contractual Term 4 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding at end of period | $ $ 140
Aggregate Intrinsic Value, Exercisable at end of period | $ $ 130
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | shares 959,927
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ / shares $ 10.42
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 5 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $ $ 139