CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
Dividends on common stock (in dollars per share)	$ 0.25	$ 0.52	$ 0.52
Restricted stock grants, shares	157,000	685,650	806,428
Forfeitures of restricted stock, shares	275,397	25,404	24,566
Exercise of stock options, shares issued			12,000