2.2.0.7 false Income Taxes 1100 - Disclosure - Income Taxes true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Income Taxes 0 nty_IncomeTaxesDisclosureAbstract nty false na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 3 Income Taxes 1 us-gaap_IncomeTaxDisclosureTextBlock us-gaap true na duration No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 <table style="font-size:10pt; font-family:'Times New Roman',times,serif;"> <tr> <td> 10. Income Taxes         Our provision for income taxes is impacted by a number of factors, including federal taxes, our international tax structure, state tax rates in the jurisdictions where we conduct business, and our ability to utilize state tax credits that expire between 2013 and 2016. Therefore, our overall effective income tax rate could vary as a result of these factors.         The effective income tax rate for the three months ended June 30, 2010 and 2009 was 31.2% and 35.5%, respectively. The effective income tax rate for the nine months ended June 30, 2010 and 2009 was 33.7% and 35.5%, respectively. The effective income tax rate was lower for the three and nine month periods ended June 30, 2010 as compared to the prior comparable period primarily due to the impact of a UK restructuring completed during June 2010 which allows us to utilize certain tax benefits that were previously reserved and the partial release of a valuation allowance on state tax credits in the current year.         We accrue interest and penalties related to unrecognized tax benefits in income tax expense. This methodology is consistent with previous periods. At June 30, 2010, we had $1,372 and $439 accrued for the potential payment of interest and penalties, respectively. As of June 30, 2010, we were subject to U.S. Federal Income Tax examinations for the tax years 2007-2009, and to non-U.S. examinations for the tax years of 2004-2009. In addition, we are generally subject to state and local examinations for fiscal years 2006-2009.         At June 30, 2010, we had a liability of $8,711 for unrecognized tax benefits, the recognition of which would have an effect of $5,931 on income tax expense and the effective income tax rate. We do not believe that the amount will change significantly in the next 12 months. At this time, we are unable to make a reasonably reliable estimate of the timing of payments in individual years beyond 12 months due to uncertainties in the timing of tax audit outcomes.</td></tr></table> 10. Income Taxes         Our provision for income taxes is impacted by a number of factors, including federal taxes, false false false us-types:textBlockItemType textblock Description containing the entire income tax disclosure. Examples include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. This element may be used as a single block of text to encapsulate the entire disclosure including data and tables. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 136, 172 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43, 44, 45, 46, 47, 48, 49 false 1 2 false UnKnown UnKnown UnKnown false true