Securities Available for Sale (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Summary of temporarily impaired securities
Less Than 12 Months, Fair Value	$ 18,383,826
Less Than 12 Months, Unrealized Loss	(1,830,594)
12 Months or Longer, Fair Value	1,679,250
12 Months or Longer, Unrealized Loss	(395,653)
Preferred Stock [Member]
Summary of temporarily impaired securities
Less Than 12 Months, Fair Value	0
Less Than 12 Months, Unrealized Loss	0
12 Months or Longer, Fair Value	246,000
12 Months or Longer, Unrealized Loss	(4,000)
Common Stock [Member]
Summary of temporarily impaired securities
Less Than 12 Months, Fair Value	18,383,826
Less Than 12 Months, Unrealized Loss	(1,830,594)
12 Months or Longer, Fair Value	1,433,250
12 Months or Longer, Unrealized Loss	$ (391,653)