CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Total	Common Stock	Treasury Stock	Additional Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2012	$ 291,194	$ 29	$ (35,548)	$ 647,515	$ (1,655)	$ (319,147)
Balance (in shares) at Dec. 31, 2012			(1,504)
Balance (in shares) at Dec. 31, 2012	29,163	29,163
Increase (Decrease) in Stockholders' Equity
Common stock issued on exercise of stock options	6			6
Common stock issued on exercise of stock options (in shares)		1
Common stock issued under employee stock purchase plan	87			87
Common stock issued under employee stock purchase plan (in shares)		9
Share-based compensation	3,218			3,218
Other comprehensive loss	(1,683)				(1,683)
Net loss	(1,128)					(1,128)
Balance at Mar. 31, 2013	$ 291,694	$ 29	$ (35,548)	$ 650,826	$ (3,338)	$ (320,275)
Balance (in shares) at Mar. 31, 2013			(1,504)
Balance (in shares) at Mar. 31, 2013	29,173	29,173