Other (Income) Expense, Net (Foreign Currency (Gain ) Loss by Currency) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Foreign exchange	$ 2,612,000	$ 1,858,000	$ 4,454,000	$ 2,158,000
Angola, Kwanza
Foreign exchange	311,000	0	819,000	(3,000)
AustralianDollar [Member]
Foreign exchange	3,000	104,000	186,000	166,000
British Pound [Member]
Foreign exchange	173,000	770,000	285,000	496,000
Canadian Dollar [Member]
Foreign exchange	549,000	903,000	1,772,000	1,071,000
Euro [Member]
Foreign exchange	615,000	(449,000)	(145,000)	(446,000)
Nigeria, Nairas
Foreign exchange	238,000	48,000	557,000	118,000
Indonesian Rupiah [Member]
Foreign exchange	219,000	82,000	381,000	48,000
Malaysia, Ringgits
Foreign exchange	361,000	77,000	533,000	90,000
Russian Ruble [Member]
Foreign exchange	(32,000)	162,000	(37,000)	202,000
Other Currencies Net [Member]
Foreign exchange	$ 175,000	$ 161,000	$ 103,000	$ 416,000