Accrued Liabilities and Other Long-Term Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Accrued Liabilities Current And Noncurrent [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities and other current liabilities at December 31 were:

	2017		2016
Accrued expenses	$	29,764	$	33,947
Compensation and payroll taxes		34,359		23,720
Equipment purchases		20,637		6,377
Accrued pricing adjustments		11,410		3,817
Accrued professional services		2,088		2,645
Other		1,043		1,056
	$	99,301	$	71,562

Schedule of Other Long-Term Liabilities

Other long-term liabilities at December 31 were:

	2017		2016
Accrued defined benefit plan	$	34,428	$	30,515
Unrecognized tax benefits		24,211		15,340
Deferred grant and subsidy		17,173		18,259
Income tax contingencies		8,319		8,163
Deferred compensation		8,870		6,433
Other		1,924		2,663
	$	94,925	$	81,373