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Stockholders' Equity - Preferred Stock (Details) - $ / shares	Dec. 12, 2016	Sep. 14, 2016	Jun. 17, 2016	Mar. 15, 2016	Dec. 14, 2015	Sep. 09, 2015	Jun. 09, 2015	Mar. 16, 2015
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
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Dividend Amount	$ 0.5000	$ 0.5000	$ 0.5000	$ 0.50	$ 0.6333

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

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