Derivative Financial Instruments - (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Financial Instruments [Abstract]

Schedule Of Contracts Designated As Hedged Instruments

	September 30, 2018
	Notional	Latest
	Amount	Maturity
Foreign exchange contracts - Canadian Dollars	$9,129	August 2019
Foreign exchange contracts - Euros	€ 10,244	August 2019

	December 31, 2017
	Notional	Latest
	Amount	Maturity
Foreign exchange contracts - Norwegian Kroner	NOK 2,629	February 2018
Foreign exchange contracts - Canadian Dollars	$9,538	February 2019
Foreign exchange contracts - British Pounds	£1,737	February 2019
Foreign exchange contracts - Euros	€ 15,928	February 2019

Schedule Of Derivative Instruments Fair Value And Balance Sheet Classification

	Classification	September 30, 2018		December 31, 2017
Derivative instruments in asset positions:
Forward exchange contracts	Prepaid and other current assets	$	614	$	40
Forward exchange contracts	Other long-term assets	$	-	$	6
Derivative instruments in liability positions:
Forward exchange contracts	Accounts payable and accrued liabilities	$	-	$	919
Forward exchange contracts	Other long-term liabilities	$	-	$	74