Unaudited Consolidated Statements of Changes in Shareholders’ Equity (Parentheticals) (Preferred Stock [Member], USD $)	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011
Preferred Stock [Member]
Preferred stock dividends, per share	$ 25.00	$ 25.00

Aggregate dividends declared during the period for each share of preferred stock outstanding.

No definition available.

Name:	us-gaap_PreferredStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration