CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parentheticals) (USD $)	12 Months Ended
Dec. 31, 2014
Series A Preferred Stock
Preferred stock dividend rate (usd per share)	$ 2.61
Series B Preferred Stock
Preferred stock dividend rate (usd per share)	$ 1.47

The amount per share used to calculated dividend payments on preferred stock.

No definition available.

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