Business Combinations - Summary of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Dec. 17, 2019	Dec. 06, 2019	Oct. 04, 2019	Dec. 31, 2020	Mar. 31, 2020
Fair value of identifiable intangible assets acquired:
Goodwill				$ 267,212	$ 267,165
Topaz
Business Acquisition [Line Items]
Initial purchase price			$ 8,000
Settlement of pre-existing net liabilities			1,671
Fair value of contingent consideration			1,850
Working capital adjustment			(344)
Total purchase price			11,177
Fair value of the net tangible assets acquired and liabilities assumed:
Acquired cash and cash equivalents			353
Accounts receivable			1,528
Prepaid expense and other assets			139
Equipment and improvements			194
Operating lease assets			534
Accounts payable			(224)
Accrued compensation and related benefits			(155)
Contract liabilities			(370)
Operating lease liabilities			(240)
Operating lease liabilities, net of current			(360)
Other liabilities			(102)
Total net tangible assets acquired and liabilities assumed			1,297
Fair value of identifiable intangible assets acquired:
Goodwill			5,380
Total identifiable intangible assets acquired			9,880
Total purchase price			11,177
Medfusion
Business Acquisition [Line Items]
Initial purchase price		$ 43,000
Settlement of pre-existing net liabilities		24
Working capital adjustment		(148)
Total purchase price		42,876
Fair value of the net tangible assets acquired and liabilities assumed:
Acquired cash and cash equivalents		204
Accounts receivable		986
Prepaid expense and other assets		387
Equipment and improvements		434
Accounts payable		(1,360)
Accrued compensation and related benefits		(270)
Contract liabilities		(529)
Deferred income tax liability		(953)
Other liabilities		(443)
Total net tangible assets acquired and liabilities assumed		(1,544)
Fair value of identifiable intangible assets acquired:
Goodwill		23,570
Total identifiable intangible assets acquired		44,420
Total purchase price		42,876
OTTO
Business Acquisition [Line Items]
Initial purchase price	$ 22,000
Settlement of pre-existing net liabilities	19
Working capital adjustment	(59)
Total purchase price	21,960
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	79
Accounts payable	(2)
Accrued compensation and related benefits	(123)
Contract liabilities	(11)
Other liabilities	(26)
Total net tangible assets acquired and liabilities assumed	70
Fair value of identifiable intangible assets acquired:
Goodwill	19,490
Total identifiable intangible assets acquired	21,890
Total purchase price	21,960
Computer Software, Intangible Asset | Topaz
Fair value of identifiable intangible assets acquired:
Total identifiable intangible assets acquired			$ 4,500
Computer Software, Intangible Asset | Medfusion
Fair value of identifiable intangible assets acquired:
Total identifiable intangible assets acquired		13,800
Computer Software, Intangible Asset | OTTO
Fair value of identifiable intangible assets acquired:
Total identifiable intangible assets acquired	$ 2,400
Customer Relationships | Medfusion
Fair value of identifiable intangible assets acquired:
Total identifiable intangible assets acquired		6,800
Trade Names | Medfusion
Fair value of identifiable intangible assets acquired:
Total identifiable intangible assets acquired		$ 250