Pension and Other Postretirement Benefits - Contributions to Plans (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Contributions made during the period	$ 1,277	$ 1,399	$ 4,457	$ 4,890
Contributions expected for the remainder of the fiscal year			2,665	2,357
Total			$ 7,122	$ 7,247

Defined Benefit Plan, Plan Assets, Contributions Expected for Remainder of Fiscal Year

No definition available.

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Namespace Prefix:	pyx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration