Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					6 Months Ended
	Sep. 30, 2014		Jun. 30, 2014	Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Software license fees	$ 32,189			$ 32,591		$ 58,876		$ 64,334	[1]
Maintenance fees	89,023			88,819		177,483		175,981
Subscription fees	19,949			19,931		39,311		40,063
Services fees	7,997			6,827		16,411		14,498
Application services fees	21,735			24,525		43,322		48,626
Total revenues	170,893			172,693		335,403		343,502
Operating expenses	156,306			161,896		324,102		329,716
Income (loss) from continuing operations	14,587			10,797		11,301		13,786
Restructuring expenses	2,255		2,975	219		5,230		5,022
Dynatrace [Member]
Segment Reporting Information [Line Items]
Restructuring expenses	136					895
Mainframe [Member]
Segment Reporting Information [Line Items]
Restructuring expenses	83					313
Application Services [Member]
Segment Reporting Information [Line Items]
Restructuring expenses	0					0
Operating Segments [Member] | Dynatrace [Member]
Segment Reporting Information [Line Items]
Software license fees	25,883			25,027	[1]	47,270		48,557	[1]
Maintenance fees	29,400			24,596	[1]	57,695		48,397	[1]
Subscription fees	19,949			19,931		39,311		40,063
Services fees	7,923			6,796		16,255		14,398
Total revenues	83,155			76,350		160,531		151,415
Operating expenses	73,285			69,260	[1]	148,918		143,671	[1]
Income (loss) from continuing operations	9,870			7,090		11,613		7,744
Operating Segments [Member] | Mainframe [Member]
Segment Reporting Information [Line Items]
Software license fees	6,306			7,564	[1]	11,606		15,777	[1]
Maintenance fees	59,623			64,223	[1]	119,788		127,584	[1]
Services fees	74			31		156		100
Total revenues	66,003			71,818		131,550		143,461
Operating expenses	15,907			16,821	[1]	33,023		35,632	[1]
Income (loss) from continuing operations	50,096			54,997		98,527		107,829
Operating Segments [Member] | Application Services [Member]
Segment Reporting Information [Line Items]
Application services fees	21,735			24,525		43,322		48,626
Total revenues	21,735			24,525		43,322		48,626
Operating expenses	28,899			34,362		62,291		59,785
Income (loss) from continuing operations	(7,164)			(9,837)		(18,969)		(11,159)
Unallocated Expenses & Eliminations [Member]
Segment Reporting Information [Line Items]
Operating expenses	38,215	[2]		41,453	[3]	79,870	[4]	90,628	[5]
Income (loss) from continuing operations	(38,215)	[2]		(41,453)	[3]	(79,870)	[4]	(90,628)	[5]
Restructuring expenses	$ 2,300			$ 219		$ 5,200		$ 5,000

[1] Prior year amounts have been reclassified to reflect the transition of Dynatrace for Mainframe from the Mainframe segment to the Dynatrace segment.

[2] Unallocated operating expenses include $2.3 million in restructuring expenses. See note 9 for additional information.

[3] Unallocated operating expenses include $219,000 in restructuring expenses. See note 9 for additional information.

[4] Unallocated operating expenses include $5.2 million in restructuring expenses. See note 9 for additional information.

[5] Unallocated operating expenses include $5.0 million in restructuring expenses. See note 9 for additional information.