Schedule Of Reportable Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Sales to external customers	$ 291,429	$ 264,884	$ 285,859	$ 269,886	$ 282,341	$ 270,480	$ 279,367	$ 278,255	$ 1,112,058		$ 1,110,443		$ 1,112,814
Intercompany sales									0		0		0
Net income:
Continuing operations	24,929	18,987	23,315	18,627	19,216	18,173	27,078	23,090	85,858		87,557		67,518
Discontinued operations	482	514	734	659	271	1,060	917	832	2,389		3,080		2,334
Total assets	1,234,270				1,111,746				1,234,270		1,111,746		1,115,052
Interest income									1,142		1,411		1,809
Interest expense									10,677		11,344		14,116
Noncash items:
Depreciation and amortization									30,764		31,702		32,866
Pension income (expense)									(12,361)		(3,673)		4,967
Income tax provision									35,145	[1]	41,401	[1]	33,807	[1]
Capital expenditures									36,517		32,209		30,390
Long-lived assets	152,755				147,465				152,755		147,465		145,763
North America
Segment Reporting Information [Line Items]
Sales to external customers									559,193		551,927		561,140
Intercompany sales									122,013		114,354		100,094
Net income:
Continuing operations									70,577		64,270		53,674
Discontinued operations									0		0		0
Total assets	836,418				726,476				836,418		726,476		742,707
Interest income									243		364		78
Interest expense									52		106		29
Noncash items:
Depreciation and amortization									19,732		21,446		22,036
Pension income (expense)									(4,765)		2,138		10,800
Income tax provision									35,602		39,125		31,821
Capital expenditures									17,963		20,129		20,035
Long-lived assets	85,087				85,923				85,087		85,923		85,643
Europe
Segment Reporting Information [Line Items]
Sales to external customers									289,760		289,549		286,753
Intercompany sales									98,491		98,096		116,471
Net income:
Continuing operations									18,398		20,424		11,689
Discontinued operations									0		0		0
Total assets	394,463				352,601				394,463		352,601		340,305
Interest income									90		147		192
Interest expense									175		350		253
Noncash items:
Depreciation and amortization									5,357		5,354		6,239
Pension income (expense)									(6,328)		(4,700)		(5,638)
Income tax provision									6,133		7,362		6,187
Capital expenditures									11,833		5,106		4,384
Long-lived assets	33,162				25,460				33,162		25,460		25,273
International
Segment Reporting Information [Line Items]
Sales to external customers									263,105		268,967		264,921
Intercompany sales									21,075		18,641		18,305
Net income:
Continuing operations									20,373		19,238		24,818
Discontinued operations									2,389		3,080		2,334
Total assets	222,427				205,959				222,427		205,959		194,127
Interest income									809		886		1,215
Interest expense									2		78		137
Noncash items:
Depreciation and amortization									5,675		4,902		4,591
Pension income (expense)									(1,268)		(1,111)		(195)
Income tax provision									6,182		8,085		5,726
Capital expenditures									6,721		6,974		5,971
Long-lived assets	34,505				36,081				34,505		36,081		34,846
Reconciling Items
Segment Reporting Information [Line Items]
Sales to external customers									0		0		0
Intercompany sales									(241,579)		(231,091)		(234,870)
Net income:
Continuing operations									(23,490)		(16,375)		(22,663)
Discontinued operations									0		0		0
Total assets	(219,038)				(173,290)				(219,038)		(173,290)		(162,087)
Interest income									0		14		324
Interest expense									10,448		10,810		13,697
Noncash items:
Depreciation and amortization									0		0		0
Pension income (expense)									0		0		0
Income tax provision									(12,772)		(13,171)		(9,927)
Capital expenditures									0		0		0
Long-lived assets	$ 1				$ 1				$ 1		$ 1		$ 1

[1] The components of income before income taxes and the provision for income taxes relate to continuing operations.