Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Business and Operations - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended			9 Months Ended	0 Months Ended
	Sep. 30, 2014 Segment	Sep. 30, 2014 Industrial Supply Segment	Sep. 30, 2014 Industrial Supply North America Location	Sep. 30, 2014 Special Situations Segment	Oct. 17, 2014 Subsequent Event GRSA Acquisition
Organization And Business Activities [Line Items]
Business acquisition, purchase price					$ 525.0
Number of Reportable Segment	2	1		1
Number of warehouse operating locations			9