Stockholder's Equity - Preferred Stock (Details) (Series A Preferred Stock [Member], USD $)	0 Months Ended
Dec. 16, 2014	Sep. 08, 2014	Jun. 09, 2014	Mar. 17, 2014	Dec. 09, 2013	Sep. 16, 2013	Jun. 12, 2013	Mar. 15, 2013
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Dividend Amount	$ 0.5391	$ 0.5391	$ 0.5391	$ 0.5391	$ 0.5391	$ 0.5391	$ 0.5391	$ 0.5391

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