Share Based Awards (Details 2) (USD $)	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Summary of stock options granted
Number of Share Granted	469,000	556,500	459,400
Exercise Price Granted	$ 17.68
Exercise of option grants	5 years
Option Grants Expires	Nov. 05, 2020
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Fifteen August Two Thousand Thirteen [Member]
Summary of stock options granted
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]
Summary of stock options granted
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]
Summary of stock options granted
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
Two Thousand Five Stock Options Plan [Member] | Option Grant Dates Fiscal Year Two Thousand Fourteen [Member]
Summary of stock options granted
Option Grant Date	Fiscal year 2014 option grants
Number of Share Granted	469,000
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Twenty Three January Two Thousand Thirteen [Member]
Summary of stock options granted
Option Grant Date	January 23, 2013
Number of Share Granted	40,000
Exercise Price Granted	$ 19.00
Exercise of option grants	5 years
Option Grants Expires	Jan. 23, 2021
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Five November Two Thousand Twelve [Member]
Summary of stock options granted
Option Grant Date	November 5, 2012
Number of Share Granted	5,000
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Twenty Five September Two Thousand Twelve [Member]
Summary of stock options granted
Option Grant Date	September 25, 2012
Number of Share Granted	20,000
Exercise Price Granted	$ 18.42
Exercise of option grants	5 years
Option Grants Expires	Sep. 25, 2020
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Twenty Four May Two Thousand Twelve [Member]
Summary of stock options granted
Option Grant Date	May 24, 2012
Number of Share Granted	346,000
Exercise Price Granted	$ 29.17
Exercise of option grants	5 years
Option Grants Expires	May 24, 2020
Two Thousand Five Stock Options Plan [Member] | Option Grant Date twenty fourth May two thousand twelve (Second Grand) [Member]
Summary of stock options granted
Option Grant Date	May 24, 2012
Number of Share Granted	30,000
Exercise Price Granted	$ 29.17
Exercise of option grants	4 years
Option Grants Expires	May 24, 2020
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Twenty three May two thousand twelve [Member]
Summary of stock options granted
Option Grant Date	May 23, 2012
Number of Share Granted	115,500
Exercise Price Granted	$ 29.45
Exercise of option grants	5 years
Option Grants Expires	May 23, 2020
Two Thousand Five Stock Options Plan [Member] | Option Grant Date Fiscal Year Two Thousand Thirteen [Member]
Summary of stock options granted
Number of Share Granted	556,500
Two Thousand Five Stock Options Plan [Member] | September 17, 2009 [Member]
Summary of stock options granted
Option Grant Date	May 31, 2011
Number of Share Granted	459,400
Exercise Price Granted	$ 43.04
Exercise of option grants	5 years
Option Grants Expires	May 31, 2019
Two Thousand Five Stock Options Plan [Member] | Fiscal year 2011 option grants [Member]
Summary of stock options granted
Number of Share Granted	459,400