Summarized Financial Information of Unconsolidated Joint Ventures (Additional Information) (Detail) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2010	Dec. 31, 2012 Entity	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Rogers INOAC Corporation [Member]	Sep. 30, 2012 Rogers INOAC Corporation [Member]	Dec. 31, 2012 Rogers INOAC Suzhou Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Number of joint ventures that are 50% owned		2
Ownership interest in joint venture					50.00%	50.00%	50.00%
Equity income in unconsolidated joint ventures	$ 100,000	$ 4,743,000	$ 5,451,000	$ 8,658,000
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions				600,000
Equity Method Investment, Net Sales Proceeds				9,300,000
Equity Method Investment, Realized Gain (Loss) on Disposal				$ 3,200,000