Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional amounts of outstanding foreign currency forward contracts by currency

Notional amounts are used to measure the volume of foreign currency forward contracts and do not represent the Company's total exposure to foreign currency gains or losses. The table below presents the net notional amounts of the Company’s outstanding foreign currency forward contracts by currency at December 31, 2017 and 2016 (in thousands):

	Year Ended December 31,
	2017		2016
Swedish kroner	$	59,373	$	48,555
European euro	34,800		156,352
British pound sterling	34,317		33,862
Brazilian real	7,794		2,747
Canadian dollar	7,426		15,645
Japanese yen	3,362		3,251
Australian dollar	2,817		1,653
Other	3,095		—
	$	152,984	$	262,065

The carrying amount of the foreign exchange contracts included in the Consolidated Balance Sheets are as follows (in thousands):

	December 31, 2017				December 31, 2016
	Prepaid Expenses and Other Current Assets		Other Current Liabilities		Prepaid Expenses and Other Current Assets		Other Current Liabilities
Foreign exchange contracts	$	1,760	$	579	$	2,369	$	75