Share Based Awards (Details 2) - $ / shares			12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Share Granted			1,414,000	469,650	469,000
Two Thousand Five Stock Options Plan [Member] | Option Grant Dates Fiscal Year Two Thousand Sixteen [Member] [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			Fiscal year 2016 option grants
Number of Share Granted			1,414,000
Two Thousand Five Stock Options Plan [Member] | Option Grant Date March 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			March 1, 2016
Number of Share Granted			450,000
Exercise Price Granted			$ 15.60
Exercise of option grants			4 years
Option Grants Expires			Mar. 01, 2024
Two Thousand Five Stock Options Plan [Member] | Option Grant Date February 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			February 1, 2016
Number of Share Granted			200,000
Exercise Price Granted			$ 14.20
Exercise of option grants			4 years
Option Grants Expires			Feb. 01, 2024
Two Thousand Five Stock Options Plan [Member] | Option Grant Date January 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			January 4, 2016
Number of Share Granted			200,000
Exercise Price Granted			$ 16.85
Option Grants Expires			Jan. 04, 2024
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Seventeenth August Two Thousand Fifteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			August 17, 2015
Number of Share Granted			150,000
Exercise Price Granted			$ 12.80
Option Grants Expires			Aug. 17, 2023
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Twenty Second May Two Thousand Fifteen [Member] [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			May 22, 2015
Number of Share Granted			414,000
Exercise Price Granted			$ 16.64
Exercise of option grants			5 years
Option Grants Expires			May 22, 2023
Two Thousand Five Stock Options Plan [Member] | Option Grant Dates Fiscal Year Two Thousand Fifteen [Member] [Domain]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			Fiscal year 2015 option grants
Number of Share Granted			469,650
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Eleven March Two Thousand Fifteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			March 11, 2015
Number of Share Granted			10,000
Exercise Price Granted			$ 15.84
Exercise of option grants			5 years
Option Grants Expires			Mar. 11, 2023
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Two September Two Thousand Fourteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			September 2, 2014
Number of Share Granted			20,000
Exercise Price Granted			$ 15.63
Exercise of option grants			5 years
Option Grants Expires			Sep. 02, 2022
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Three June Two Thousand Fourteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			June 3, 2014
Number of Share Granted			439,650
Exercise Price Granted			$ 15.99
Exercise of option grants			5 years
Option Grants Expires			Jun. 03, 2022
Two Thousand Five Stock Options Plan [Member] | Option Grant Dates Fiscal Year Two Thousand Fourteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			Fiscal year 2014 option grants
Number of Share Granted			469,000
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Fifteen August Two Thousand Thirteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			August 15, 2013
Number of Share Granted			85,000
Exercise Price Granted			$ 20.85
Exercise of option grants			5 years
Option Grants Expires			Aug. 15, 2021
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Thirty July Two Thousand Thirteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			July 30, 2013
Number of Share Granted			28,000
Exercise Price Granted			$ 22.59
Exercise of option grants			5 years
Option Grants Expires			Jul. 30, 2021
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Twenty Nine May Two Thousand Thirteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option Grant Date			May 29, 2013
Number of Share Granted			356,000
Exercise Price Granted			$ 17.95
Exercise of option grants			5 years
Option Grants Expires			May 29, 2021
Scenario, Forecast [Member] | Share-based Compensation Award, Tranche One [Member] | Two Thousand Five Stock Options Plan [Member] | Option Grant Date January 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested (in shares)		100,000
Scenario, Forecast [Member] | Share-based Compensation Award, Tranche Two [Member] | Two Thousand Five Stock Options Plan [Member] | Option Grant Date January 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vested (in shares)	100,000
Stock Options [Member] | Two Thousand Five Stock Options Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting term commencement, term from date of grant			1 year
Stock Options [Member] | Two Thousand Five Stock Options Plan [Member] | Option Grant Date Seventeenth August Two Thousand Fifteen [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise of option grants			5 years