Income Taxes	9 Months Ended
Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We accrued interest expense of $39 thousand and $58 thousand during the three-month periods ended September 30, 2017 and September 30, 2016, respectively, and $142 thousand and $185 thousand during the nine-month periods ended September 30, 2017 and September 30, 2016, respectively, excluding the reversal of accrued interest related to adjustments for the remeasurement of uncertain tax positions. Our total gross liability for unrecognized tax benefits at September 30, 2017 is $4.1 million. If recognized, $2.7 million of unrecognized tax benefits would impact our effective tax rate. Interest of $0.8 million has been reflected as a component of the total liability. We expect no significant increases or decreases for uncertain tax positions during the next twelve months. We file U.S. federal income tax returns, as well as income tax returns in various states and several foreign jurisdictions. The years 2014 through 2016 are open for examination by the Internal Revenue Service (“IRS”), and various years are open for examination by state and foreign tax authorities. State and foreign jurisdictional statutes of limitations generally range from three to four years.

Income Taxes

9 Months Ended

Sep. 30, 2017

We accrued interest expense of $39 thousand and $58 thousand during the three-month periods ended September 30, 2017 and September 30, 2016, respectively, and $142 thousand and $185 thousand during the nine-month periods ended September 30, 2017 and September 30, 2016, respectively, excluding the reversal of accrued interest related to adjustments for the remeasurement of uncertain tax positions. Our total gross liability for unrecognized tax benefits at September 30, 2017 is $4.1 million. If recognized, $2.7 million of unrecognized tax benefits would impact our effective tax rate. Interest of $0.8 million has been reflected as a component of the total liability. We expect no significant increases or decreases for uncertain tax positions during the next twelve months.

We file U.S. federal income tax returns, as well as income tax returns in various states and several foreign jurisdictions. The years 2014 through 2016 are open for examination by the Internal Revenue Service (“IRS”), and various years are open for examination by state and foreign tax authorities. State and foreign jurisdictional statutes of limitations generally range from three to four years.