Income Tax Expense (Tables)

9 Months Ended

Sep. 30, 2018

Income Tax Disclosure [Abstract]

Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of beginning and ending amount of our unrecognized tax benefits is as follows:

	Nine months ended September 30, 2018
	(in thousands)
Unrecognized tax benefits as of December 31, 2017	$	525
Additions for tax positions of current year		61
Additions for tax positions of prior years		(2	)
Reductions for settlements with taxing authorities		—
Reductions for lapses of the applicable statutes of limitations		—
Unrecognized tax benefits as of September 30,	$	584

Summary of Tax Years Subject to Examination in Taxing Jurisdictions

As of September 30, 2018, a summary of the tax years that remain subject to examination in our taxing jurisdictions is as follows:

United States	2015 and forward
Foreign	2011 and forward