Share Based Awards (Tables)

3 Months Ended

Jun. 30, 2011

Share Based Awards (Tables) [Abstract]

Summary of Stock Option Activity

				Weighted-		Weighted-
				Average		Average		Aggregate
				Exercise		Remaining		Intrinsic
	Number of			Price		Contractual		Value
	Shares			per Share		Life (years)		(in thousands)
Outstanding, April 1, 2011		698,778		$	44.40		3.9
Granted		229,700			86.08		7.9
Exercised		(86,952	)		39.42		1.8	$	4,163
Forfeited/Canceled		—			—		—
Outstanding, June 30, 2011		841,526		$	56.29		5.0	$	26,097
Vested and expected to vest, June 30, 2011		819,212		$	56.14		5.0	$	25,530
Exercisable, June 30, 2011		273,873		$	36.23		2.2	$	13,986

Schedule of Share Based Compensation Valuation Assumption

	Three Months			Three Months
	Ended			Ended
	June 30, 2011			June 30, 2010
Expected life	4.3 years			4.2 years
Expected volatility		41.2	%		44.6% - 44.7	%
Expected dividends		1.6	%		2.1	%
Risk-free rate		1.8	%		2.0% - 2.1	%

Summary of stock options granted

	Number of				Vesting
Option Grant Date	Shares		Exercise Price		Terms (1)	Expires
May 31, 2011		229,700	$	86.08	Five years	May 31, 2019
Fiscal year 2012 option grants		229,700
November 29, 2010		10,000	$	64.32	Five years	November 29, 2018
August 3, 2010		5,000		55.24	Five years	August 3, 2018
June 4, 2010		25,000		56.29	Five years	June 4, 2018
June 2, 2010		15,000		58.62	Five years	June 2, 2018
Fiscal year 2011 option grants		55,000

(1) Options vest in equal annual installments on each grant anniversary date commencing one year following the date of grant.

Schedule of Performance Based Awards Under Incentive plan

	Three Months			Three Months
	Ended			Ended
	June 30, 2011			June 30, 2010
Expected life	4.3 years			4.2 years
Expected volatility		41.2	%		44.4	%
Expected dividends		1.8	%		2.1	%
Risk-free rate		1.8	%		1.8	%

Schedule of Employee Stock Options and Performance Based Awards by Nonvested Stock options

				Weighted-
				Average
	Non-Vested			Grant-Date
	Number of			Fair Value
	Shares			per Share
Outstanding, April 1, 2011		401,518		$	16.17
Granted		229,700			26.64
Vested		(63,565	)		12.01
Forfeited/Canceled		—			—
Outstanding, June 30, 2011		567,653		$	20.87

Restricted stock units award activity

			Weighted-
			Average
			Grant-Date
	Number of		Fair Value
	Shares		per Share
Outstanding, April 1, 2011		11,448	$	54.18
Granted		—		—
Vested		—		—
Outstanding, June 30, 2011		11,448	$	54.18