Income Taxes

The following table provides details of income taxes:



	Three Months Ended
	March 31,
	2016			2015
Income before income taxes	$	19,561		$	3,097
Provision for income taxes	$	5,622		$	1,249
Effective tax rate	28.7		%	40.3		%

The income tax provision for the three months ended March 31, 2016 was computed based on the Company’s annual forecast of profit by jurisdiction and forecasted effective tax rate for the year. The changes in the Company’s effective tax rate for the three months ended March 31, 2016 compared to the same period for the prior year are primarily due to the mix of forecasted earnings by jurisdictions, additional foreign tax credits generated and the availability of the research and development credit in 2016.

The Company currently has a partial valuation allowance recorded against certain foreign and state net operating loss and credit carryforwards where the realizability of such deferred tax assets is substantially in doubt. Each quarter, the Company assesses the likelihood that it will be able to recover its deferred tax assets. The Company considers available evidence, both positive and negative, including forecasted earnings in assessing the need for a valuation allowance. As a result of the Company’s analysis, it concluded that it is more likely than not that a portion of its deferred tax assets will not be realized. Therefore, the Company continues to provide a valuation allowance against certain deferred tax assets. The Company continues to monitor available evidence and may reverse some or all of the remaining valuation allowance in future periods, if appropriate. The Company has a recorded valuation allowance against certain of its deferred tax assets of $2,205 as of March 31, 2016 and December 31, 2015.