15.	Income Taxes

The following table presents the benefit from income taxes for the respective periods:

	Three Months Ended March 31,
(dollars in thousands)	2018			2017
Benefit from income taxes	$	(4,131	)	$	(12,496	)
Effective tax rate		29.9	%		34.4	%

Our effective tax rate for the three months ended March 31, 2018 decreased to 29.9% from 34.4% when compared to the same period in 2017. This change was primarily due to a decrease in the effective tax rate due to Tax Reform enacted in December 2017 and a decrease in the loss before benefit from income taxes. The income tax benefit of share-based compensation remained relatively unchanged for the three months ended March 31, 2018 compared to the same period in 2017 however, the impact relative to the loss before benefit from income taxes is larger in 2018.

On December 22, 2017, Tax Reform was signed into law. As a result of Tax Reform, the U.S. statutory tax rate was lowered from 35% to 21% effective January 1, 2018, among other changes. ASC Topic 740, Accounting for Income Taxes, requires companies to recognize the effect of tax law changes in the period of enactment. ASU 2018-05 and Staff Accounting Bulletin No. 118 (“SAB 118”) issued by the Securities and Exchange Commission allows a company to record a provisional amount when it does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain tax effects of Tax Reform. The Company has recognized the provisional tax impacts of Tax Reform in its consolidated financial statements for the year ended December 31, 2017. Based on a review of the guidance issued by the Internal Revenue Service in the first quarter of 2018, no adjustment to the provisional amount recorded in the consolidated financial statements for the year ended December 31, 2017 was deemed necessary. We continue to assess new guidance and refine our computation of these provisional amounts and will complete our analysis within the one-year measurement period ending December 22, 2018.