Intangible Assets (Details) - USD ($)		12 Months Ended
	Jan. 04, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Finite Lived Intangible Assets [Line Items]
2017 (remaining three months)		$ 19,115
Finite-Lived Intangible Assets, Amortization Expense, Year Two		16,703
Finite-Lived Intangible Assets, Amortization Expense, Year Three		15,706
Finite-Lived Intangible Assets, Amortization Expense, Year Four		10,974
Finite-Lived Intangible Assets, Amortization Expense, Year Five		2,048
Intangible assets, other than capitalized software development costs
Gross carrying amount		123,840	$ 125,728
Accumulated amortization		(54,627)	(34,053)
Net intangible assets		69,213	91,675
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Five		4,667
Amortization		(22,462,000)	(11,014,000)	$ (7,127,000)
Customer Relationships [Member]
Intangible assets, other than capitalized software development costs
Amortization		(10,435,000)	(5,368,000)	(3,709,000)
Operating Expense [Member]
Finite Lived Intangible Assets [Line Items]
2017 (remaining three months)		7,264
Finite-Lived Intangible Assets, Amortization Expense, Year Two		4,852
Finite-Lived Intangible Assets, Amortization Expense, Year Three		3,855
Finite-Lived Intangible Assets, Amortization Expense, Year Four		3,006
Finite-Lived Intangible Assets, Amortization Expense, Year Five		1,868
Intangible assets, other than capitalized software development costs
Net intangible assets		24,970
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Five		4,125
Cost of Revenue [Member]
Finite Lived Intangible Assets [Line Items]
2017 (remaining three months)		11,851
Finite-Lived Intangible Assets, Amortization Expense, Year Two		11,851
Finite-Lived Intangible Assets, Amortization Expense, Year Three		11,851
Finite-Lived Intangible Assets, Amortization Expense, Year Four		7,968
Finite-Lived Intangible Assets, Amortization Expense, Year Five		180
Intangible assets, other than capitalized software development costs
Net intangible assets		44,243
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Five		542
Software and Software Development Costs [Member]
Intangible assets, other than capitalized software development costs
Amortization		(12,027,000)	(5,646,000)	$ (3,418,000)
Customer Relationships [Member]
Intangible assets, other than capitalized software development costs
Gross carrying amount		50,550	50,550
Accumulated amortization		(28,972)	(19,618)
Net intangible assets		21,578	30,932
Trade Name & Contracts [Member]
Intangible assets, other than capitalized software development costs
Gross carrying amount		5,480	7,368
Accumulated amortization		(2,088)	(2,895)
Net intangible assets		3,392	4,473
Software Technology [Member]
Intangible assets, other than capitalized software development costs
Gross carrying amount		67,810	67,810
Accumulated amortization		(23,567)	(11,540)
Net intangible assets		$ 44,243	$ 56,270
HealthFusion [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 75,000,000
Intangible assets, other than capitalized software development costs
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	6 years 11 months
HealthFusion [Member] | Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 28,500,000
Intangible assets, other than capitalized software development costs
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
HealthFusion [Member] | Software Technology [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets	$ 42,500,000
Intangible assets, other than capitalized software development costs
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years