SEGMENT REPORTING - Adjusted Net Income (Parenthetical) (Detail) (Segment [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Interest income	$ 0.9	$ 0.8	$ 2.4	$ 1.9

Amount of interest income earned from interest bearing assets not separately disclosed.

No definition available.

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