Shareholders' Equity - Schedule of Declared Distributions (Details) (USD $)	0 Months Ended
Jan. 16, 2015
Series D
Class of Stock [Line Items]
Dividend declared (in dollars per share)	$ 0.40625
Series E
Class of Stock [Line Items]
Dividend declared (in dollars per share)	$ 0.453125

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