Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value of Financial Instruments [Abstract]

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

The following tables present our financial assets and liabilities that are measured at fair value on a recurring basis and are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value.

(In thousands)			Fair Value Measurements at September 30, 2016
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Assets:
Short-term investments	$	117,951	$	—	$	117,951	$	—
Foreign currency forward   exchange contracts   not accounted for using   hedge accounting		86		—		86		—
	$	118,038	$	—	$	118,038	$	—
Liabilities:
Interest rate swaps	$	1,260	$	—	$	1,260	$	—

			Fair Value Measurements at December 31, 2015
			Quoted Prices in		Significant Other		Significant
			Active Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Assets:
Short-term investments	$	82,847	$	—	$	82,847	$	—
Foreign currency forward  exchange contracts  not accounted for using  hedge accounting		123		—		123		—
	$	82,970	$	—	$	82,970	$	—
Liabilities:
Interest rate swaps	$	1,026	$	—	$	1,026	$	—