Share Based Awards (Tables)

12 Months Ended

Mar. 31, 2012

Share-Based Awards [Abstract]

Summary of stock option activity

	Number of Shares			Weighted- Average Exercise Price per Share		Weighted- Average Remaining Contractual Life (years)		Aggregate Intrinsic Value
								(In thousands)
Outstanding, March 31, 2009		1,640,164		$	16.20
Granted		578,968		$	29.22
Exercised		(475,206	)	$	12.32			$	8,254
Outstanding, March 31, 2010		1,743,926		$	21.58
Granted		110,000		$	29.15
Exercised		(307,428	)	$	18.60			$	7,093
Forfeited/Canceled		(148,942	)	$	27.50
Outstanding, March 31, 2011		1,397,556		$	22.20		3.9
Granted		459,400		$	43.04		7.2
Exercised		(697,157	)	$	18.34		1.3	$	17,698
Forfeited/Canceled		(171,462	)	$	36.66		6.4
Outstanding, March 31, 2012		988,337		$	32.09		5.4	$	11,499
Vested and expected to vest, March 31, 2012		953,153		$	32.07		5.4	$	11,113
Exercisable, March 31, 2012		210,018		$	24.88		3.8	$	3,959

Schedule of share based compensation valuation assumption

	Year Ended March 31, 2012		Year Ended March 31, 2011		Year Ended March 31, 2010
Expected life		4.3 years		4.2 years		4.4 - 4.8 years
Expected volatility		41.2%		42.6% - 44.7%		45.5% - 47.7%
Expected dividends		1.6%		1.9% - 2.2%		1.9% - 2.2%
Risk-free rate		1.8%		1.5% - 2.1%		0.8% - 2.4%

Summary of stock options granted

Option Grant Date	Number of Shares		Exercise Price		Vesting Terms(1)		Expires
May 31, 2011		459,400	$	43.04		Five years		May 31, 2019
Fiscal year 2012 option grants		459,400
November 29, 2010		20,000	$	32.16		Five years		November 29, 2018
August 3, 2010		10,000	$	27.62		Five years		August 3, 2018
June 4, 2010		50,000	$	28.15		Five years		June 4, 2018
June 2, 2010		30,000	$	29.31		Five years		June 2, 2018
Fiscal year 2011 option grants		110,000
February 16, 2010		236,118	$	28.48		Five years		February 16, 2018
February 16, 2010		6,000	$	28.48		Two years		February 16, 2013
December 7, 2009		126,850	$	30.15		Five years		December 7, 2017
November 30, 2009		150,000	$	29.75		Five years		November 30, 2017
September 17, 2009		60,000	$	29.02		Five years		September 17, 2017
Fiscal year 2010 option grants		578,968

(1) Options vest in equal annual installments on each grant anniversary date beginning one year after the grant date.

Schedule of performance based awards under incentive plan

	Year Ended March 31, 2012		Year Ended March 31, 2011		Year Ended March 31, 2010
Expected life		4.3 years		4.3 years		4.4 years
Expected volatility		41.2% - 42.2%		41.6%		45.5%
Expected dividends		1.4% - 1.9%		1.5%		2.2%
Risk-free rate		0.8% - 1.8%		2.2%		2.3%

Schedule of employee stock options and performance based awards by nonvested stock options

	Non-Vested Number of Shares			Weighted- Average Grant-Date Fair Value per Share
Outstanding, March 31, 2009		930,690		$	5.87
Granted		578,968		$	9.65
Vested		(287,986	)	$	6.02
Outstanding, March 31, 2010		1,221,672		$	7.63
Granted		110,000		$	9.24
Vested		(379,694	)	$	6.43
Forfeited/Canceled		(148,942	)	$	9.41
Outstanding, March 31, 2011		803,036		$	8.08
Granted		459,400		$	13.32
Vested		(312,655	)	$	7.22
Forfeited/Canceled		(171,462	)	$	11.55
Outstanding, March 31, 2012		778,319		$	10.76

Restricted stock units award activity

	Number of Shares			Weighted- Average Grant-Date Fair Value per Share
Outstanding, March 31, 2009		—
Granted		16,000		$	26.93
Outstanding, March 31, 2010		16,000		$	26.93
Granted		18,292		$	27.31
Vested		(11,396	)	$	27.22
Outstanding, March 31, 2011		22,896		$	27.09
Granted		22,668		$	39.75
Vested		(15,563	)	$	27.51
Outstanding, March 31, 2012		30,001		$	36.32