Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
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	54,602	54,483
Common stock, shares outstanding	54,602	54,470
Common stock in treasury, shares	96	107