Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Accrued Liabilities [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities at December 31 consisted of:

	2017		2016
Payroll and other compensation	$	53,857	$	37,560
Deferred revenue and customer advances	40,472		34,812
Pension and other postretirement benefits	8,294		8,261
Accrued income taxes	26,340		26,477
Other	52,278		49,857
	$	181,241	$	156,967