Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Accounts receivable, allowance for uncollectibles	$ 467	$ 350
Common stock, par value	$ 0.01	$ 0.01
Common stock, authorized shares	10,000,000	10,000,000
Common stock, issued shares	6,216,570	6,054,741
Treasury stock, common shares	733,694	635,189
Preferred Stock 100 Par Value [Member]
Preferred shares, par value	$ 100	$ 100
Preferred shares, authorized shares	5,000	5,000
Preferred shares, issued shares	5,000	5,000
Preferred Stock 0.01 Par Value [Member]
Preferred shares, par value	$ 0.01	$ 0.01
Preferred shares, authorized shares	10,000,000	10,000,000
Preferred shares, unissued shares	10,000,000	10,000,000