CONSOLIDATED BALANCE SHEETS PARENTHETICAL (USD $)	Dec. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets Parentheticals [Abstract]
Available for Sale at Fair value - Amortized cost	$ 19,559,432,000	$ 14,182,880,000
Preferred stock par value	$ 0.01	$ 0.01
Preferred stock shares authorized	10,000,000	10,000,000
Preferred stock shares issued
Preferred stock shares outstanding
Common stock par value	$ 0.01	$ 0.01
Common stock shares authorized	140,000,000	140,000,000
Common stock shares issued	79,137,758	79,137,758
Common stock shares outstanding	73,927,331	73,363,195
Treasury Shares Held	5,210,427	5,770,024
Allowances for Loan and Lease Losses, Real Estate	$ 11,580,000	$ 11,793,000