CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Accumulated depreciation on Property and equipment (in Dollars)	$ 39,983	$ 38,286	[1]
Preferred stock shares par value (in Dollars per share)	$ 0.01	$ 0.01	[1]
Preferred stock, shares authorized	3,000,000	3,000,000	[1]
Preferred stock, shares issued	0	0	[1]
Preferred stock, shares outstanding	0	0	[1]
Common stock, shares par value (in Dollars per share)	$ 0.01	$ 0.01	[1]
Common stock, authorized shares	170,000,000	170,000,000	[1]
Common stock, issued shares	50,631,943	58,817,561	[1]
Common stock, outstanding shares	50,631,943	58,817,561	[1]

[1] Condensed from audited financial statements.