Commitments, Off-Balance Sheet Arrangements and Contingent Liabilities (Details Textuals) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Loss Contingencies [Line Items]
Loss contingency reserve	$ 22,000,000		$ 22,000,000
Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Textuals) [Abstract]
Standby letters of credit Fair value	3,754,000	[1]	3,811,000	[1]
Commitment on standby letters of credit	250,030,000		303,705,000
Carrying value of investments	33,000,000		35,000,000
Commitments under unconsolidated projects	16,000,000		18,000,000
Repurchase reserve for potential claims relating to loans previously sold	6,000,000		3,000,000
Residential mortgage loans sold with recourse risk	56,000,000		79,000,000
Residential mortgage loans sold with credit recourse risk	233,000,000		321,000,000
Reinsurance treaties minimum limit to assume liability for losses as percentage of aggregate risk exposure	5.00%
Reinsurance treaties maximum limit to assume liability for losses as percentage of aggregate risk exposure	10.00%
Corporations liability for reinsurance losses	0		8,000,000
Loans sold to outside investors original amount	17,600,000,000
Loans sold to outside investors remaining outstanding amount	7,500,000,000
Loans repurchased under make whole requests	3,000,000		5,000,000
Loss reimbursement claims under make whole requests	$ 3,000,000		$ 4,000,000

[1] (1) The commitment on standby letters of credit was $250 million and $304 million at December 31, 2013 and 2012, respectively. See Note 15 for additional information on the standby letters of credit and for information on the fair value of lending-related commitments.