Consolidated Statements of Changes in Shareholders’ Equity (Parentheticals) (Preferred Stock [Member], USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Preferred Stock [Member]
Preferred stock dividends, per share	$ 50.00	$ 50.00	$ 50.00

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