Junior Subordinated Debentures (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2009 Dodd-Frank Act [Member]
Junior Subordinated Debentures [Line Items]
Common stock issued by Trusts	$ 6,900,000	$ 7,200,000
Term of LIBOR variable base rate	3 months
Loss on junior subordinated debentures carried at fair value	2,197,000	2,203,000	2,197,000
Total assets	$ 11,636,112,000	$ 11,795,443,000	$ 11,562,858,000	$ 15,000,000,000
Restricted core capital percentage	18.60%