Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Stockholder's equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	49,000,000	49,000,000
Common stock, issued shares	23,211,846	23,211,846
Common stock, outstanding shares	22,101,649	22,105,499
Treasury Stock Shares	1,110,197	1,106,347