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Share-based Compensation - SSARs Rollforward (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 31, 2018
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 (54,679)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price | $ / shares $ 9.56
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 1,094,978
Number of Rights, Granted | shares 204,213
Number of Rights, Exercised | shares (41,691)
Number of Rights, Forfeited | shares (99,661)
Number of Rights, Outstanding at end of period | shares 1,103,160
Number of Rights, Exercisable at end of period | shares 604,596
Weighted Average Exercise Price, Outstanding at beginning of period | $ / shares $ 10.44
Weighted Average Exercise Price, Granted | $ / shares 10.56
Weighted Average Exercise Price, Exercised | $ / shares 9.14
Weighted Average Exercise Price, Forfeited | $ / shares 10.02
Weighted Average Exercise Price, Outstanding at end of period | $ / shares 10.60
Weighted Average Exercise Price, Exercisable at end of period | $ / shares $ 10.46
Remaining Contractual Term, Outstanding 5 years 2 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Vested and Expected to Vest, Outstanding, Remaining Contractual Term 4 years 7 months 6 days
Aggregate Intrinsic Value, Outstanding at end of period | $ $ 1,570
Aggregate Intrinsic Value, Exercisable at end of period | $ $ 996
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number | shares 1,103,160
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ / shares $ 10.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 5 years 2 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value | $ $ 1,570