Securities Available for Sale (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Summary of temporarily impaired securities
Less Than 12 Months, Fair Value	$ 1,852,000
Less Than 12 Months, Unrealized Loss	(222,903)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Loss	0
Preferred Stock [Member]
Summary of temporarily impaired securities
Less Than 12 Months, Fair Value	241,000
Less Than 12 Months, Unrealized Loss	(9,000)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Loss	0
Common Stock [Member]
Summary of temporarily impaired securities
Less Than 12 Months, Fair Value	1,611,000
Less Than 12 Months, Unrealized Loss	(213,903)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Loss	$ 0