Income Taxes	9 Months Ended
Sep. 30, 2012
Text Block [Abstract]
Income Taxes	Income Taxes We are subject to income tax in the U.S. federal jurisdiction and various state and foreign jurisdictions and have identified our federal tax return and tax returns in California and Massachusetts as “major” tax filings. U.S. federal tax examinations through 1998 have been concluded. Our U.S. federal tax returns for the years 1999 through 2006 were not reviewed and are no longer open to examination by the IRS. Our U.S. federal tax returns for 2007 and subsequent years remain open to examination. Our California tax returns for 2006 and subsequent years remain open to examination. Our Massachusetts tax returns for 2008 and subsequent years remain open to examination. We are currently under audit examination by the IRS for the 2008 and 2009 tax years, which began in July 2011. To the extent the final tax liabilities are different from the amounts originally accrued, the increases or decreases will be recorded as income tax expense or benefit in the consolidated statements of operations. While the actual outcome is subject to the completion of these audits, we do not believe there will be a material adverse impact on our results of operations. At September 30, 2012, our unrecognized tax benefit was $0.7 million, the recognition of which would reduce our income tax expense by $0.6 million. We expect that our unrecognized tax benefit will change in the next 12 months; however we do not expect the change to have a significant impact on our financial position or our results of operations.

Income Taxes

9 Months Ended

Sep. 30, 2012

We are subject to income tax in the U.S. federal jurisdiction and various state and foreign jurisdictions and have identified our federal tax return and tax returns in California and Massachusetts as “major” tax filings. U.S. federal tax examinations through 1998 have been concluded. Our U.S. federal tax returns for the years 1999 through 2006 were not reviewed and are no longer open to examination by the IRS. Our U.S. federal tax returns for 2007 and subsequent years remain open to examination. Our California tax returns for 2006 and subsequent years remain open to examination. Our Massachusetts tax returns for 2008 and subsequent years remain open to examination.

We are currently under audit examination by the IRS for the 2008 and 2009 tax years, which began in July 2011. To the extent the final tax liabilities are different from the amounts originally accrued, the increases or decreases will be recorded as income tax expense or benefit in the consolidated statements of operations. While the actual outcome is subject to the completion of these audits, we do not believe there will be a material adverse impact on our results of operations.

At September 30, 2012, our unrecognized tax benefit was $0.7 million, the recognition of which would reduce our income tax expense by $0.6 million. We expect that our unrecognized tax benefit will change in the next 12 months; however we do not expect the change to have a significant impact on our financial position or our results of operations.