Certificates and Other Time Deposits (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Time Deposits [Abstract]
Time Deposits, $100,000 or More	$ 489,900,000	$ 577,300,000
Interest Expense, Time Deposits, $100,000 or More	3,800,000	6,300,000	14,100,000
2013	1,024,075,000
2014	232,946,000
2015	61,493,000
2016	30,458,000
2017	25,710,000
2018 and thereafter	575,000
Certificates of Deposit, at Carrying Value	$ 1,375,257,000