Share-based Compensation (Details Textual)	3 Months Ended	6 Months Ended
	Sep. 30, 2015 USD ($) shares	Sep. 30, 2015 USD ($) shares
Stock Based Compensation (Textual) [Abstract]
Maximum number of shares subject to stock options and restricted shares	1,000,000
Stock Options [Member]
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 | $	$ 3,800,000	$ 3,800,000
Weighted-average vesting period	1 year 9 months 29 days
Stock Settled Stock Appreciation Rights (SSARS) [Member]
Stock Based Compensation (Textual) [Abstract]
Shares withheld to cover the employee's minimum applicable income taxes	892
Unrecognized stock based compensation expense related to non-vested SSARs | $	$ 2,800,000	2,800,000
Weighted-average vesting period	2 years 3 months 22 days
Total treasury shares to settle SSARs	2,499
Performance Shares [Member]
Stock Based Compensation (Textual) [Abstract]
Unrecognized stock based compensation expense related to non-vested restricted stock | $	$ 66,500.0	$ 66,500.0
Weighted-average vesting period		10 months 13 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