Stock-Based Compensation (Tables)

12 Months Ended

Mar. 31, 2013

Stock-based Compensation Disclosure [Abstract]

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]

Exercise Price Range	Option Shares Exercisable	Weighted-Average Exercise Price Per Share
$ 12.65 - $ 25.00	81	$	17.32
25.01 - 35.00	1,432	31.59
35.01 - 94.00	84	61.02
94.01 - 100.00	462	95.14
100.01 - 134.97	1,195	107.98
	3,254

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Exercise Price Range	Option Shares Outstanding	Weighted-Average Exercise Price Per Share		Weighted-Average Remaining Life (in years)
$ 12.65 - $ 25.00	971	$	23.03	6.8
25.01 - 35.00	2,649	31.86		4.7
35.01 - 94.00	84	61.02		0.3
94.01 - 100.00	462	95.14		1.3
100.01 - 134.97	1,195	107.98		1.1
	5,361

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

	Number of Shares		Weighted-Average Exercise Price Per Share
Options outstanding at March 31, 2010	6,054		$	57.75
Granted	729		33.12
Exercised	(634	)	21.85
Canceled/forfeited	(730	)	48.94
Options outstanding at March 31, 2011	5,419		59.82
Granted	810		33.99
Exercised	(117	)	25.32
Canceled/forfeited	(488	)	48.80
Options outstanding at March 31, 2012	5,624		57.78
Granted	966		23.72
Exercised	(25	)	21.80
Canceled/forfeited	(1,204	)	51.87
Options outstanding at March 31, 2013	5,361		$	53.13

Assumptions used to determine the weighted-average fair value of option grants

	2013		2012		2011
Expected dividend yield	1.44	%	1.39	%	1.39	%
Risk-free interest rate	0.81	%	1.95	%	2.37	%
Expected volatility	51.80	%	47.16	%	52.64	%
Expected life (in years)	5.02		5.12		5.18

Restricted stock and restricted stock unit transactions

	Number of Shares		Weighted-Average Grant Date Value
Unvested shares at March 31, 2010	1,605		$	34.80
Granted	1,867		33.02
Vested	(617	)	38.62
Canceled/forfeited	(218	)	30.42
Unvested shares at March 31, 2011	2,637		33.01
Granted	1,370		33.48
Vested	(1,075	)	31.49
Canceled/forfeited	(59	)	32.68
Unvested shares at March 31, 2012	2,873		33.83
Granted	2,185		24.04
Vested	(1,177	)	31.22
Canceled/forfeited	(143	)	58.30
Unvested shares at March 31, 2013	3,738		$	27.99

Schedule of Nonvested Share Activity [Table Text Block]

	Number of Shares		Weighted-Average Grant Date Fair Value
Shares unvested at March 31, 2012	2,290		$	14.00
Granted	966		9.47
Vested	(874	)	15.17
Canceled/forfeited	(275	)	12.35
Shares unvested at March 31, 2013	2,107		$	11.65