Business Combinations and Dispositions - HealthFusion Acquisition - USD ($)		3 Months Ended	6 Months Ended
	Jan. 04, 2016	Sep. 30, 2016	Sep. 30, 2016	Mar. 31, 2016
Business Acquisition [Line Items]
Goodwill		$ 188,555,000	$ 188,555,000	$ 188,837,000
Fair value adjustments			5,830,000
HealthFusion [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High	$ 25,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	16,700,000
Initial purchase price	165,000,000
Preliminary working capital and other adjustments	1,067,000
Total preliminary purchase price	182,767,000
Acquired cash and cash equivalents	2,225,000
Accounts receivable, net	1,514,000
Prepaid expenses and other current assets	4,645,000
Other assets	700,000
Accounts payable	(1,085,000)
Accrued compensation and related benefits	(533,000)
Deferred revenues	(1,067,000)
Deferred income taxes, net	(12,027,000)
Other liabilities	(2,721,000)
Total preliminary net tangible assets acquired and liabilities assumed	(7,275,000)
Goodwill	115,042,000
Total preliminary identifiable intangible assets acquired	190,042,000
Total preliminary purchase price	182,767,000
Fair value adjustments		$ 3,000,000	$ 5,400,000
HealthFusion [Member] | Computer Software, Intangible Asset [Member]
Business Acquisition [Line Items]
Intangible assets	42,500,000
HealthFusion [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Intangible assets	4,000,000
HealthFusion [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets	28,500,000
HealthFusion [Member] | Equipment and Improvements, Net [Member]
Business Acquisition [Line Items]
Property, plant and equipment	767,000
HealthFusion [Member] | Software Development [Member]
Business Acquisition [Line Items]
Property, plant and equipment	$ 307,000