Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Changes In accumulated other comprehensive income [Roll Forward]
Beginning balance	$ (34,091)
Other comprehensive loss before reclassifications	(3,849)
Amounts reclassified from accumulated other comprehensive loss	301
Net current-period other comprehensive (loss)/income	(3,548)
Ending balance	(37,639)
Reclassification Adjustments Out Of AOCI [Abstract]
Interest expense, net	495	651
Selling, general and administrative expenses	11,104	9,960
Cost of goods sold	50,136	47,800
Net income	11,168	7,038
Amounts reclassified from accumulated other comprehensive income [Member]
Reclassification Adjustments Out Of AOCI [Abstract]
Net income	(301)
Foreign Currency Translation Adjustments [Member]
Changes In accumulated other comprehensive income [Roll Forward]
Beginning balance	5,177
Other comprehensive loss before reclassifications	(3,836)
Amounts reclassified from accumulated other comprehensive loss	0
Net current-period other comprehensive (loss)/income	(3,836)
Ending balance	1,341
Interest Rate Swap Agreement [Member]
Changes In accumulated other comprehensive income [Roll Forward]
Beginning balance	(600)
Other comprehensive loss before reclassifications	(13)
Amounts reclassified from accumulated other comprehensive loss	69
Net current-period other comprehensive (loss)/income	56
Ending balance	(544)
Interest Rate Swap Agreement [Member] | Amounts reclassified from accumulated other comprehensive income [Member]
Reclassification Adjustments Out Of AOCI [Abstract]
Interest expense, net	(107)
Tax benefit	38
Net of Tax	(69)
Pension Plans [Member]
Changes In accumulated other comprehensive income [Roll Forward]
Beginning balance	(38,668)
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	232
Net current-period other comprehensive (loss)/income	232
Ending balance	(38,436)
Pension Plans [Member] | Amounts reclassified from accumulated other comprehensive income [Member]
Reclassification Adjustments Out Of AOCI [Abstract]
Total before tax	(348)
Tax benefit	116
Net of Tax	(232)
Actuarial Loss [Member] | Amounts reclassified from accumulated other comprehensive income [Member]
Reclassification Adjustments Out Of AOCI [Abstract]
Selling, general and administrative expenses	(292)
Cost of goods sold	(28)
Prior Service Cost [Member] | Amounts reclassified from accumulated other comprehensive income [Member]
Reclassification Adjustments Out Of AOCI [Abstract]
Selling, general and administrative expenses	$ (28)