Other (Income) Expense, Net (Foreign Currency (Gain ) Loss by Currency) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Foreign exchange	$ 1,002,000	$ (1,300,000)	$ 1,842,000	$ 300,000
Angola, Kwanza
Foreign exchange	372,000	0	508,000	(3,000)
AustralianDollar [Member]
Foreign exchange	64,000	69,000	183,000	62,000
British Pound [Member]
Foreign exchange	(262,000)	(222,000)	112,000	(274,000)
Canadian Dollar [Member]
Foreign exchange	(51,000)	(860,000)	1,223,000	168,000
Euro [Member]
Foreign exchange	295,000	(50,000)	(760,000)	2,000
Nigeria, Nairas
Foreign exchange	180,000	11,000	319,000	75,000
Russian Ruble [Member]
Foreign exchange	47,000	(136,000)	(5,000)	40,000
Other Currencies Net [Member]
Foreign exchange	$ 357,000	$ (112,000)	$ 262,000	$ 230,000