Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Common stock, par value
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	111,892,969	112,164,891
Common stock, shares outstanding	111,892,969	112,164,891
Allowance for covered loans	$ 12,635	$ 14,320