CONDENSED CONSOLIDATED BALANCE SHEETS PARENTHETICAL (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Available for Sale at Fair value - Amortized cost	$ 19,917,350	$ 19,559,432
Preferred stock par value (per share)	$ 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 (per share)	$ 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	70,543,024	73,927,331
Treasury stock, shares	8,594,734	5,210,427
Allowances for Loan and Lease Losses, Real Estate	$ 7,669	$ 11,580