CONSOLIDATED BALANCE SHEETS PARENTHETICAL (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
LIABILITIES AND SHAREHOLDERS' EQUITY
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000	100,000
Common stock, shares issued (in shares)	27,122	27,117
Common stock, shares outstanding (in shares)	22,705	22,700
Treasury stock, common shares held (in shares)	4,417	4,417