Annual report pursuant to Section 13 and 15(d)

RESTRUCTURING CHARGES - Schedule of Restructuring Expense (Details)

v2.4.1.9
RESTRUCTURING CHARGES - Schedule of Restructuring Expense (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2013
Restructuring Costs [Abstract]      
Restructuring expense related to cost of revenue $ 0qtm_RestructuringChargesToCostOfRevenue $ 539qtm_RestructuringChargesToCostOfRevenue $ 0qtm_RestructuringChargesToCostOfRevenue
Restructuring expense in operating expense 1,666qtm_RestructuringChargesToOperatingExpense 10,675qtm_RestructuringChargesToOperatingExpense 10,171qtm_RestructuringChargesToOperatingExpense
Restructuring expense 1,666us-gaap_RestructuringCosts 11,214us-gaap_RestructuringCosts 10,171us-gaap_RestructuringCosts
Restructuring Charges [Abstract]      
Severance and benefits 406us-gaap_SeveranceCosts1 6,139us-gaap_SeveranceCosts1 8,251us-gaap_SeveranceCosts1
Facilities 1,250us-gaap_BusinessExitCosts1 4,303us-gaap_BusinessExitCosts1 1,920us-gaap_BusinessExitCosts1
Other 10us-gaap_OtherRestructuringCosts 772us-gaap_OtherRestructuringCosts 0us-gaap_OtherRestructuringCosts
Restructuring expense $ 1,666us-gaap_RestructuringCosts $ 11,214us-gaap_RestructuringCosts $ 10,171us-gaap_RestructuringCosts