Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Receivables:
Allowances for contract receivables	$ 1,171	$ 591
Allowances for employee advances and miscellaneous receivables	335	669
Accumulated amortization on intangible assets	$ 19,873	$ 17,573
Shareholders' equity (Note B):
Common stock, par value	$ 0	$ 0
Common stock, stated value per share	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	24,461,859	23,932,774
Common stock, shares outstanding	24,461,859	23,932,774