Capital Preferred Stock (Additional Information) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	50,000,000	50,000,000
Preferred Stock, Shares Outstanding	12,000	12,000
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 4,056	$ 4,056	$ 4,056
Series B Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	4,056	4,056	4,056
Preferred Stock, Shares Authorized				5,010
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	5,875	5,875	$ 5,793
Preferred Stock, Shares Authorized			5,000
Series F Preferred Stock [Member]
Class of Stock [Line Items]
Preferred Stock, Dividends, Per Share, Cash Paid	$ 6,219	$ 0