Income Taxes	6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense related to continuing operations for the three and six months ended June 30, 2019 was $4.0 million and $5.2 million, respectively. Income tax benefit related to continuing operations for the three months ended June 30, 2018 was $0.5 million and income tax expense related to continuing operations for the six months ended June 30, 2018 was $5.7 million. Changes in income tax expense (benefit) during the periods presented primarily relate to a change in mix of taxable income and an $8.3 million income tax benefit arising from the release of adjustments to certain existing deferred tax asset valuation allowances as the result of the Altek acquisition in 2018 not recurring in 2019. An income tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, based on technical merits, including resolutions of any related appeals or litigation processes. The reserve for uncertain tax positions at June 30, 2019 was $4.5 million, including interest and penalties. Within the next twelve months, it is reasonably possible that up to $0.1 million of unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations.

Income Taxes

6 Months Ended

Jun. 30, 2019

Income tax expense related to continuing operations for the three and six months ended June 30, 2019 was $4.0 million and $5.2 million, respectively. Income tax benefit related to continuing operations for the three months ended June 30, 2018 was $0.5 million and income tax expense related to continuing operations for the six months ended June 30, 2018 was $5.7 million. Changes in income tax expense (benefit) during the periods presented primarily relate to a change in mix of taxable income and an $8.3 million income tax benefit arising from the release of adjustments to certain existing deferred tax asset valuation allowances as the result of the Altek acquisition in 2018 not recurring in 2019.

An income tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, based on technical merits, including resolutions of any related appeals or litigation processes. The reserve for uncertain tax positions at June 30, 2019 was $4.5 million, including interest and penalties. Within the next twelve months, it is reasonably possible that up to $0.1 million of unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations.