CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Common stock, par value			[1]
Common stock, shares authorized	300,000	300,000	[1]
Common stock, shares issued	100,699	100,211	[1]
Common stock, shares outstanding	100,699	100,211	[1]

[1] The year-end condensed consolidated balance sheet data was derived from audited financial statements but does not include all disclosures required by generally accepted accounting principles.