Sale Leaseback Arrangements - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Leases [Abstract]
Deferred gains on sale/leaseback transactions	$ 5.8	$ 4.8	$ 17.5	$ 17.5

The portion of the deferred gain that was recognized in the current period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 40
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=35688829&loc=d3e50609-112754

Name:	us-gaap_SaleLeasebackTransactionCurrentPeriodGainRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration