CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Available-for-sale securities, amortized cost basis	$ 3,318,301	$ 2,900,410
Allowance for loan losses	211,738	230,408
Allowances for loan losses, covered loans	$ 6,434	$ 4,225
STOCKHOLDERS' EQUITY
Preferred stock, Series A, Par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, Series A, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, Series A, shares issued (in shares)	200,000	200,000
Preferred stock, Series A, shares outstanding (in shares)	85,710	85,741
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	156,370,318	155,743,241
Common stock, shares outstanding (in shares)	148,961,927	148,542,940
Treasury stock (in shares)	7,408,391	7,200,301