Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 131,846	$ 112,877	$ 125,156	$ 112,743
OCI before reclassifications	(4,682)	(7,772)	1,824	(7,904)
Amount reclassified from accumulated OCI	405	(391)	589	(125)
Other Comprehensive Income (Loss)	(4,277)	(8,163)	2,413	(8,029)
Ending Balance	127,569	104,714	127,569	104,714
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Abstract]
Net Sales	331,312	344,760	640,381	676,197
Cost of Products Sold	237,379	251,203	461,200	489,056
Amortization of prior service costs and unrecognized gains (losses)	15	236	723	536
Interest Expense	(835)	(741)	(1,573)	(1,751)
Income tax provision	(3,075)	(10,625)	(5,300)	(3,150)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	149,948	117,659	143,845	117,465
OCI before reclassifications	(12,596)	158	(6,493)	352
Amount reclassified from accumulated OCI	0	0	0	0
Other Comprehensive Income (Loss)	(12,596)	158	(6,493)	352
Ending Balance	137,352	117,817	137,352	117,817
Accumulated Long-Term Notes Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(12,021)	1,153	(12,566)	2,845
OCI before reclassifications	7,660	(7,896)	8,205	(9,588)
Amount reclassified from accumulated OCI	0	0	0	0
Other Comprehensive Income (Loss)	7,660	(7,896)	8,205	(9,588)
Ending Balance	(4,361)	(6,743)	(4,361)	(6,743)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(4,872)	(6,649)	(5,414)	(6,785)
OCI before reclassifications	(48)	362	436	485
Amount reclassified from accumulated OCI	65	(132)	123	(119)
Other Comprehensive Income (Loss)	17	230	559	366
Ending Balance	(4,855)	(6,419)	(4,855)	(6,419)
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Abstract]
Amortization of prior service costs and unrecognized gains (losses)	65	(138)	123	(123)
Income tax provision	0	6	0	4
Total after tax	65	(132)	123	(119)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1,209)	714	(709)	(782)
OCI before reclassifications	302	(396)	(324)	847
Amount reclassified from accumulated OCI	340	(259)	466	(6)
Other Comprehensive Income (Loss)	642	(655)	142	841
Ending Balance	(567)	59	(567)	59
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Abstract]
Total before tax	401	(278)	544	9
Income tax provision	(61)	19	(78)	(15)
Total after tax	340	(259)	466	(6)
Foreign Exchange Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Abstract]
Net Sales	138	(306)	148	(442)
Commodity Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Abstract]
Cost of Products Sold	251	(31)	384	325
Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Abstract]
Interest Expense	$ 12	$ 59	$ 12	$ 126