Fair Value Measurements - Fair Value of Assets and Liabilities on a Recurring Basis (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands		Dec. 31, 2020	Mar. 31, 2020
Carrying Value
ASSETS
Cash and cash equivalents	[1]	$ 89,523	$ 138,012
Restricted cash and cash equivalents		4,208	2,307
Total		93,731	140,319
LIABILITIES
Contingent consideration related to acquisitions		1,975	1,900
Total		1,975	1,900
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value
ASSETS
Cash and cash equivalents	[1]	89,523	138,012
Restricted cash and cash equivalents		4,208	2,307
Total		93,731	140,319
LIABILITIES
Contingent consideration related to acquisitions		0	0
Total		0	0
Significant Other Observable Inputs (Level 2) | Fair Value
ASSETS
Cash and cash equivalents	[1]	0	0
Restricted cash and cash equivalents		0	0
Total		0	0
LIABILITIES
Contingent consideration related to acquisitions		0	0
Total		0	0
Unobservable Inputs (Level 3) | Fair Value
ASSETS
Cash and cash equivalents	[1]	0	0
Restricted cash and cash equivalents		0	0
Total		0	0
LIABILITIES
Contingent consideration related to acquisitions		1,975	1,900
Total		$ 1,975	$ 1,900

[1] Cash equivalents consist primarily of money market funds.