Segment Information - Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues from external customers	$ 102,528	$ 93,797
Net income (loss)	5,238	2,871
Total assets	286,989	264,647	262,402
Metal Bearing Components Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	70,900	63,688
Net income (loss)	5,956	4,024
Total assets	206,825	192,768
Precision Metal Components Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	23,738	20,743
Net income (loss)	1,641	1,049
Total assets	54,812	43,774
Plastic and Rubber Components Segment [Member]
Segment Reporting Information [Line Items]
Revenues from external customers	7,890	9,366
Net income (loss)	151	259
Total assets	16,939	19,945
Corporate and Consolidations [Member]
Segment Reporting Information [Line Items]
Revenues from external customers
Net income (loss)	(2,510)	(2,461)
Total assets	$ 8,413	$ 8,160