Significant Accounting Policies (Summary of Activity Related to Allowance for Credit Losses) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	$ 22,360
Acquisitions and Dispositions	(3,534)
Provisions	11,623
Write-offs	(6,863)
Balance at end of period	24,003
Cumulative Effect, Period of Adoption, Adjustment [Member] | ASU 2016-13 [Member]
Accounts Receivable, Allowance for Credit Loss [Line Items]
Balance at beginning of period	$ 417