Stock-Based Compensation (Summary of Award Activity) (Details) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	8,250
Grants	1,893
Stock option exercises/vesting RSUs	(446)
Retired or forfeited	(464)
Outstanding	9,233
Maximum period for exercise	10 years
Vesting period	4 years
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	6,774
Grants	966
Stock option exercises/vesting RSUs	(198)
Retired or forfeited	(312)
Outstanding	7,230
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding	1,476
Grants	927
Stock option exercises/vesting RSUs	(248)
Retired or forfeited	(152)
Outstanding	2,003
Stock Options and RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares available for future grant	5,653
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shares available for future grant	864