Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Summary of Accrued Expenses

Accrued expenses as of June 30, 2018 and December 31, 2017 are comprised of the following (in thousands):

	June 30, 2018		December 31, 2017
Payroll, benefits and related taxes, excluding severance benefits	$	16,378	$	16,724
Withholding tax attributable to intercompany interest income		19,264		18,138
Interest on senior notes		8,268		8,268
Outside service fees		1,089		1,942
Others		4,507		6,674
Accrued expenses	$	49,506	$	51,746