Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company's effective tax rate was 24.5% for the six months ended June 30, 2019 as compared to 37.0% for the six months ended June 30, 2018. The effective tax rate of 24.5% for the six months ended June 30, 2019 was lower than the rate of the prior comparable period primarily due to Internal Revenue Service (“IRS”) audit adjustments for tax years 2011 to 2013 recognized in the prior period.

The total gross unrecognized tax benefit as of June 30, 2019 and December 31, 2018 was $5.6 million and $5.2 million, respectively, excluding interest, penalties and related tax benefits. The Company estimates the unrecognized tax benefit may decrease over the upcoming 12 months by an amount up to $1.3 million related to settlements with taxing authorities and the lapse of statutes of limitations. For the remaining liability, due to the uncertainties related to these tax matters, the Company is unable to make a reasonably reliable estimate as to when cash settlement with a taxing authority will occur.

As of June 30, 2019, accrued interest was $1.5 million and accrued penalties were less than $0.1 million, excluding any related income tax benefits. As of December 31, 2018, accrued interest was $1.1 million and accrued penalties were less than $0.1 million, excluding any related income tax benefits. The Company recognizes interest accrued related to unrecognized tax benefits and penalties as a component of its income tax provision recognized in its Consolidated Statements of Comprehensive Income.

The Company files federal income tax returns and the Company or one of its subsidiaries file income tax returns in various state and international jurisdictions.The IRS examination of tax years 2011 to 2013 concluded during the three months ended June 30, 2019, and the Company received a refund of $13.3 million, inclusive of interest income of $0.9 million. With few exceptions, the Company is no longer subject to federal, state or non-United States tax examinations by tax authorities for years before 2011. The Company believes that adequate reserves have been provided related to all matters contained in the tax periods open to examination.