Rental Fleet (Parenthetical) (Detail)	Mar. 31, 2018 USD ($)
Tank & Pump Solutions
Property Subject to or Available for Operating Lease [Line Items]
Residual value	$ 0

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration