Earnings Per Common Share - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended
Sep. 30, 2013
Series A Preferred Stock [Member]
Earnings Per Common Share [Line Items]
Weighted average common shares outstanding	20.6
Share Options and Other Stock Awards [Member]
Earnings Per Common Share [Line Items]
Weighted average common shares outstanding	6.4

Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

No definition available.

Name:	us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration