Note 4 - Earnings Per Share (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2011
Preferred Stock, Accretion of Redemption Discount	$ 1.2	$ 1.2

The amount of accretion of the preferred stock redemption discount during the period.

No definition available.

Name:	us-gaap_PreferredStockAccretionOfRedemptionDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration