|3 Months Ended|
Mar. 31, 2017
|Income Tax Disclosure [Abstract]|
We are subject to U.S. federal, state and international income taxes. We are generally no longer subject to federal, state, or international income tax examinations by tax authorities for years before 2014 with few exceptions. Due to the potential for resolution of state and foreign examinations, and the expiration of various statutes of limitations, it is reasonably possible that our gross unrecognized tax benefit balance may change within the next twelve months by a range of $0 to $1.6 million.
Effective Tax Rate. Our effective income tax rate was 20.6% and 33.5% for the three months ended March 31, 2017 and March 31, 2016, respectively. The decrease in our effective income tax rate is primarily attributable to the adoption of the new stock-based compensation guidance we prospectively adopted in the first quarter of 2017 that requires the recognition of the income tax effects of awards in the income statement when the awards vest or are settled. These amounts were previously recognized in additional paid-in-capital. Additionally, the 2017 rate is lower due to adjustments for uncertain tax positions related to the recent settlement of an income tax audit.
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.
Reference 1: http://www.xbrl.org/2003/role/presentationRef