Income Taxes	6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense related to continuing operations for the three and six months ended June 30, 2018 was $1.9 million and $10.2 million, respectively and for the three and six months ended June 30, 2017 was $11.2 million and $17.5 million, respectively. Income tax expense decreased primarily due to an $8.3 million tax benefit arising from the adjustment to certain existing deferred tax asset valuation allowances as the result of the Altek acquisition, as well as changes in U.S. tax law. 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, 2018 was $4.9 million, including interest and penalties. Within the next twelve months, it is reasonably possible that $1.1 million of unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations. As a result of the Act, the Company recorded a provisional charge of $48.7 million included in Income tax expense in the Company’s Consolidated Statements of Operations for 2017. The Company is currently accumulating and processing data to finalize the underlying calculations and expects to complete the calculation when the Company’s 2017 U.S. corporate income tax return is filed later in 2018.

Income Taxes

Income tax expense related to continuing operations for the three and six months ended June 30, 2018 was $1.9 million and $10.2 million, respectively and for the three and six months ended June 30, 2017 was $11.2 million and $17.5 million, respectively. Income tax expense decreased primarily due to an $8.3 million tax benefit arising from the adjustment to certain existing deferred tax asset valuation allowances as the result of the Altek acquisition, as well as changes in U.S. tax law.

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, 2018 was $4.9 million, including interest and penalties. Within the next twelve months, it is reasonably possible that $1.1 million of unrecognized income tax benefits will be recognized upon settlement of tax examinations and the expiration of various statutes of limitations.

As a result of the Act, the Company recorded a provisional charge of $48.7 million included in Income tax expense in the Company’s Consolidated Statements of Operations for 2017. The Company is currently accumulating and processing data to finalize the underlying calculations and expects to complete the calculation when the Company’s 2017 U.S. corporate income tax return is filed later in 2018.