Business Combinations - Summary of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 17, 2019	Dec. 06, 2019	Oct. 04, 2019	Dec. 31, 2019	Mar. 31, 2019
Preliminary fair value of identifiable intangible assets acquired:
Goodwill				$ 266,741	$ 218,771
Topaz
Business Acquisition [Line Items]
Initial preliminary purchase price			$ 8,000
Settlement of pre-existing net liabilities			1,671
Fair value of contingent consideration			1,850
Preliminary working capital adjustment			(424)
Total preliminary purchase price			11,097
Preliminary fair value of the net tangible assets acquired and liabilities assumed:
Acquired cash and cash equivalents			359
Accounts receivable			1,577
Prepaid expense and other assets			139
Equipment and improvements			194
Operating lease assets			534
Accounts payable			(250)
Accrued compensation and related benefits			(155)
Contract liabilities			(370)
Operating lease liabilities			(240)
Operating lease liabilities, net of current			(360)
Other liabilities			(98)
Total preliminary net tangible assets acquired and liabilities assumed			1,330
Preliminary fair value of identifiable intangible assets acquired:
Goodwill			5,267
Total preliminary identifiable intangible assets acquired			9,767
Total preliminary purchase price			11,097
Medfusion
Business Acquisition [Line Items]
Initial preliminary purchase price		$ 43,000
Settlement of pre-existing net liabilities		24
Preliminary working capital adjustment		(247)
Total preliminary purchase price		42,777
Preliminary fair value of the net tangible assets acquired and liabilities assumed:
Acquired cash and cash equivalents		204
Accounts receivable		968
Prepaid expense and other assets		695
Equipment and improvements		434
Accounts payable		(1,360)
Accrued compensation and related benefits		(270)
Contract liabilities		(529)
Deferred income tax liability		(1,068)
Other liabilities		(334)
Total preliminary net tangible assets acquired and liabilities assumed		(1,260)
Preliminary fair value of identifiable intangible assets acquired:
Goodwill		23,187
Total preliminary identifiable intangible assets acquired		44,037
Total preliminary purchase price		42,777
OTTO
Business Acquisition [Line Items]
Initial preliminary purchase price	$ 22,000
Settlement of pre-existing net liabilities	19
Preliminary working capital adjustment	(59)
Total preliminary purchase price	21,960
Preliminary fair value of the net tangible assets acquired and liabilities assumed:
Acquired cash and cash equivalents	102
Accounts receivable	51
Prepaid expense and other assets	42
Accounts payable	(2)
Accrued compensation and related benefits	(123)
Contract liabilities	(11)
Other liabilities	(15)
Total preliminary net tangible assets acquired and liabilities assumed	44
Preliminary fair value of identifiable intangible assets acquired:
Goodwill	19,516
Total preliminary identifiable intangible assets acquired	21,916
Total preliminary purchase price	21,960
Computer Software, Intangible Asset | Topaz
Preliminary fair value of identifiable intangible assets acquired:
Total preliminary identifiable intangible assets acquired			$ 4,500
Computer Software, Intangible Asset | Medfusion
Preliminary fair value of identifiable intangible assets acquired:
Total preliminary identifiable intangible assets acquired		13,800
Computer Software, Intangible Asset | OTTO
Preliminary fair value of identifiable intangible assets acquired:
Total preliminary identifiable intangible assets acquired	$ 2,400
Customer Relationships | Medfusion
Preliminary fair value of identifiable intangible assets acquired:
Total preliminary identifiable intangible assets acquired		6,800
Trademarks | Medfusion
Preliminary fair value of identifiable intangible assets acquired:
Total preliminary identifiable intangible assets acquired		$ 250