Accumulated Other Comprehensive Income (Loss) by Component (Changes in Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	$ 127,569	$ 104,714	$ 125,156	$ 112,743
OCI before reclassifications	(22,441)	9,858	(20,617)	1,954
Amount reclassified from accumulated OCI	95	16	684	(109)
Other Comprehensive Income (Loss)	(22,346)	9,874	(19,933)	1,845
Ending Balance	105,223	114,588	105,223	114,588
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	137,352	117,817	143,845	117,465
OCI before reclassifications	(24,470)	17,852	(30,963)	18,204
Amount reclassified from accumulated OCI	0	0	0	0
Other Comprehensive Income (Loss)	(24,470)	17,852	(30,963)	18,204
Ending Balance	112,882	135,669	112,882	135,669
Accumulated Long-Term Notes Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(4,361)	(6,743)	(12,566)	2,845
OCI before reclassifications	1,634	(8,062)	9,839	(17,650)
Amount reclassified from accumulated OCI	0	0	0	0
Other Comprehensive Income (Loss)	1,634	(8,062)	9,839	(17,650)
Ending Balance	(2,727)	(14,805)	(2,727)	(14,805)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(4,855)	(6,419)	(5,414)	(6,785)
OCI before reclassifications	(56)	265	380	750
Amount reclassified from accumulated OCI	84	(62)	207	(181)
Other Comprehensive Income (Loss)	28	203	587	569
Ending Balance	(4,827)	(6,216)	(4,827)	(6,216)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance	(567)	59	(709)	(782)
OCI before reclassifications	451	(197)	127	650
Amount reclassified from accumulated OCI	11	78	477	72
Other Comprehensive Income (Loss)	462	(119)	604	722
Ending Balance	$ (105)	$ (60)	$ (105)	$ (60)