Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]
Amount paid to settlement of claims	$ 1.3us-gaap_LitigationSettlementAmount

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

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