XML 23 R12.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Income Taxes | 3 Months Ended
--- | ---
Mar. 31, 2017
Income Tax Disclosure [Abstract] |
Income taxes | Income taxes Our effective tax rate for the three months ended March 31, 2017 and 2016 was 34.3% and 29.5%, respectively. Our effective tax rate for the current period differed from the federal statutory tax rate primarily due to the tax benefits relating to the domestic production activities deduction and the deduction for equity compensation based on ASU 2016-09 as well as state income tax expense on current year earnings. For the same period in the prior year, our effective tax rate differed from the federal statutory tax rate primarily due to the favorable resolution of certain state income tax matters. At March 31, 2017 and December 31, 2016, we had deferred tax assets, net of deferred tax liabilities and valuation allowance, of $1.0 billion and $1.0 billion, respectively. The accounting for deferred taxes is based upon estimates of future results. Differences between estimated and actual results could result in changes in the valuation of deferred tax assets that could have a material impact on our consolidated results of operations or financial position. Changes in existing tax laws could also affect actual tax results and the realization of deferred tax assets over time. Unrecognized tax benefits represent the difference between tax positions taken or expected to be taken in a tax return and the benefits recognized for financial statement purposes. At March 31, 2017 and December 31, 2016, we had $20.7 million and $21.5 million, respectively, of gross unrecognized tax benefits and $11.8 million and $12.2 million, respectively, of related accrued interest and penalties. It is reasonably possible within the next twelve months that our gross unrecognized tax benefits may decrease by up to $17.3 million, excluding interest and penalties, primarily due to expirations of certain statutes of limitations and potential settlements. As a result of the adoption of ASU No. 2016-09 (see Note 1), we recorded a cumulative-effect adjustment to increase retained earnings and deferred tax assets as of January 1, 2017 by $18.6 million, respectively, as a result of previously unrecognized excess tax benefits. We are currently under examination by the IRS and various state taxing jurisdictions and anticipate finalizing certain examinations within the next twelve months. The final outcome of these examinations is not yet determinable. The statutes of limitation for our major tax jurisdictions generally remain open for examination for tax years 2005 to 2016.

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for income taxes. Disclosures may 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
Name: | us-gaap_IncomeTaxDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration