Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common stock	Additional Paid-in Capital	Accumulated Deficit	Treasury stock
Balances at Dec. 31, 2012	$ 30,962	$ 2	$ 356,895	$ (247,096)	$ (78,839)
Balances (in shares) at Dec. 31, 2012	3,030				3,030
Balances (in shares) at Dec. 31, 2012		26,481
Increase (Decrease) in Stockholders' Equity
Net income	7,697			7,697
Stock-based compensation to employees and directors	752		752
Common stock issued upon vesting of restricted stock (in shares)		293
Purchase of treasury stock	(1,389)				(1,389)
Purchase of treasury stock (in shares)					94
Balances at Mar. 31, 2013	$ 38,022	$ 2	$ 357,647	$ (239,399)	$ (80,228)
Balances (in shares) at Mar. 31, 2013	3,124				3,124
Balances (in shares) at Mar. 31, 2013		26,774