Consolidated Statements of Cash Flows (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements of Cash Flows
Real estate acquired in full or in partial settlement of loans, covered	$ 39,793	$ 55,947	$ 0
Real estate acquired in full or in partial settlement of loans, non-covered	$ 21,342	$ 25,585	$ 10,500