Annual report pursuant to Section 13 and 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Schedule of Share-based Compensation by Type of Award (Details)

v2.4.1.9
STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Schedule of Share-based Compensation by Type of Award (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Share-based compensation by type of award:      
Total share-based compensation expense $ 11,583us-gaap_AllocatedShareBasedCompensationExpense $ 13,459us-gaap_AllocatedShareBasedCompensationExpense $ 15,139us-gaap_AllocatedShareBasedCompensationExpense
Stock purchase plan      
Share-based compensation by type of award:      
Total share-based compensation expense 864us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember 		1,277us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember 		1,828us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
Stock options      
Share-based compensation by type of award:      
Total share-based compensation expense 617us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember 		826us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember 		1,681us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
Restricted stock      
Share-based compensation by type of award:      
Total share-based compensation expense $ 10,102us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember 		$ 11,356us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember 		$ 11,630us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember