Consolidated Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Financial Condition [Abstract]
Allowance for loan losses	$ 42,271	$ 50,883
Preferred stock, no par value
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	1,000,000	1,000,000
Common stock, no par value
Common stock, shares authorized	499,000,000	499,000,000
Common stock, shares issued	37,804,457	37,804,457
Common stock, shares outstanding	32,597,762	30,937,704
Treasury stock, shares	5,206,695	6,866,753