CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ 3,393	$ (16,660)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation	2,872	3,021
Amortization	2,633	4,912
Service parts lower of cost or market adjustment	4,028	2,029
Deferred income taxes	128	382
Share-based compensation	3,356	4,287
Changes in assets and liabilities:
Accounts receivable	10,579	24,009
Manufacturing inventories	337	(4,603)
Service parts inventories	913	722
Accounts payable	(12,372)	(8,891)
Accrued warranty	(505)	211
Deferred revenue	(2,169)	(7,351)
Accrued restructuring charges	1,026	(484)
Accrued compensation	(2,370)	(1,138)
Other assets and liabilities	(2,676)	(1,555)
Net cash provided by (used in) operating activities	9,173	(1,109)
Cash flows from investing activities:
Purchases of property and equipment	(1,230)	(3,984)
(Increase) decrease in restricted cash	(37)	109
Return of principal from other investments		208
Net cash used in investing activities	(1,267)	(3,667)
Cash flows from financing activities:
Payment of taxes due upon vesting of restricted stock	(203)	(321)
Proceeds from issuance of common stock	60	176
Net cash used in financing activities	(143)	(145)
Effect of exchange rate changes on cash and cash equivalents	(8)	(70)
Net increase (decrease) in cash and cash equivalents	7,755	(4,991)
Cash and cash equivalents at beginning of period	68,976	51,261
Cash and cash equivalents at end of period	$ 76,731	$ 46,270