Joint Ventures (Additional Information) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) Entity	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Entity	Jun. 30, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of joint ventures that are 50% owned (entity) | Entity	2		2
Equity income related to joint ventures	$ 392	$ 1,062	$ 1,311	$ 2,039
Rogers INOAC Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest in joint venture (percent)	50.00%		50.00%
Rogers INOAC Suzhou Corporation [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest in joint venture (percent)	50.00%		50.00%