Share-Based Compensation (Tables)

3 Months Ended

Jun. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Restricted Shares

A summary of the Company's restricted shares granted under the Plan is presented below:

Restricted Shares	Shares (in thousands)		Weighted- Average Grant-Date Fair Value
Three months ended June 30, 2013
Outstanding at March 31, 2013	421.3		$	11.01
Granted	113.6		29.94
Vested and issued	(27.7	)	9.03
Forfeited	(3.6	)	13.24
Outstanding at June 30, 2013	503.6		15.38
Vested at June 30, 2013	83.1		9.63
Three months ended June 30, 2014:
Outstanding at March 31, 2014	437.5		$	16.76
Granted	96.6		33.50
Vested and issued	(93.7	)	15.12
Forfeited	(14.4	)	20.78
Outstanding at June 30, 2014	426.0		20.78
Vested at June 30, 2014	69.6		9.34

Stock Options, Valuation Assumptions

	Three Months Ended June 30,
	2014			2013
Expected volatility	47.3		%	48.0		%
Expected dividends	$	—		$	—
Expected term in years	6.0			6.0
Risk-free rate	2.2		%	1.3		%

Stock Option Activity

A summary of option activity under the Plan is as follows:

Options	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term	Aggregate Intrinsic Value (in thousands)
Three months ended June 30, 2013:
Outstanding at March 31, 2013	1,386.4		$	10.43
Granted	227.7		29.94
Exercised	(25.0	)	12.40
Forfeited or expired	(8.0	)	13.24
Outstanding at June 30, 2013	1,581.1		13.19		6.2	$	9,840
Exercisable at June 30, 2013	515.9		11.27		7.2	3,715
Three months ended June 30, 2014:
Outstanding at March 31, 2014	994.9		$	15.24
Granted	307.5		33.50
Exercised	(93.8	)	13.80
Forfeited or expired	(31.6	)	25.49
Outstanding at June 30, 2014	1,177.0		19.85		7.8	$	16,527
Exercisable at June 30, 2014	375.1		15.23		7.3	6,998