Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, authorized	20,000	20,000
Preferred stock, liquidation preference	$ 50	$ 50
Preferred stock, shares issued	868	868
Preferred stock, shares outstanding	868	868
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized	100,000	100,000
Common stock, shares issued	54,483	53,002
Common stock, shares outstanding	54,470	52,988
Common stock in treasury, shares	107	113