Share-based Compensation (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Sep. 30, 2014
Stock Based Compensation (Textual) [Abstract]
Maximum number of shares subject to stock options and restricted shares	1,000,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Issued During Period, Shares, Treasury Stock Reissued	8,065
Shares Paid for Option Price for Share Based Compensation	6,935
Stock Based Compensation (Textual) [Abstract]
Stock option granted		0
Restricted Stock [Member]
Stock Based Compensation (Textual) [Abstract]
Unrecognized stock based compensation expense related to non-vested restricted stock	$ 4.8	$ 4.8
Weighted-average vesting period	2 years 4 months 24 days
Stock Settled Stock Appreciation Rights (SSARS) [Member]
Stock Based Compensation (Textual) [Abstract]
Shares withheld to cover the employee's minimum applicable income taxes	1,446
Unrecognized stock based compensation expense related to non-vested SSARs	1.1	1.1
Weighted-average vesting period	2 years
Total treasury shares to settle SSARs	5,463
Performance Shares [Member]
Stock Based Compensation (Textual) [Abstract]
Unrecognized stock based compensation expense related to non-vested restricted stock	$ 0.1	$ 0.1
Weighted-average vesting period	3 months 18 days
2011 Stock Incentive Plan [Member]
Stock Based Compensation (Textual) [Abstract]
Shares authorized under 2011 Stock incentive plan	3,000,000	3,000,000
2011 Stock Incentive Plan [Member] | Stock Options [Member]
Stock Based Compensation (Textual) [Abstract]
Maximum number of shares subject to stock options and restricted shares	800,000
2011 Stock Incentive Plan [Member] | Restricted Shares and Restricted Share Units [Member]
Stock Based Compensation (Textual) [Abstract]
Maximum number of shares subject to stock options and restricted shares	400,000