Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Stockholders' equity:
Preferred stock, Authorized (in shares)	1,500,000	1,500,000
Preferred stock, Issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	45,000,000	45,000,000
Common stock, issued (in shares)	19,573,244	18,925,549