Segment Information - Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues from external customers	$ 93,023	$ 86,586	$ 283,125	$ 289,929
Net income (loss)	5,052	3,115	12,693	16,062
Total assets	261,430	261,064	261,430	261,064	265,343
Operating Segments [Member] | Metal Bearing Components Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	64,817	58,298	194,374	196,196
Net income (loss)	5,468	4,503	14,339	17,718
Total assets	193,270	199,063	193,270	199,063
Operating Segments [Member] | Precision Metal Components Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	18,790	17,132	61,076	61,005
Net income (loss)	1,337	1,894	4,205	6,055
Total assets	39,440	37,830	39,440	37,830
Operating Segments [Member] | Plastic and Rubber Components Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	9,416	11,156	27,675	32,728
Net income (loss)	4	484	462	2,725
Total assets	17,734	20,629	17,734	20,629
Corporate, Non-Segment [Member] | Corporate and Consolidations [Member]
Segment Reporting Information [Line Items]
Revenues from external customers
Net income (loss)	(1,757)	(3,766)	(6,313)	(10,436)
Total assets	$ 10,986	$ 3,542	$ 10,986	$ 3,542