CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
ASSETS
Valuation allowance	$ 50,818	$ 51,445
EQUITY
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares issued (in shares)	16,424,481	16,377,247
Common stock, shares outstanding (in shares)	16,333,922	16,290,136
Treasury stock, at cost	90,559	87,111