Related Party Transactions	3 Months Ended
Related Party Transactions	Mar. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	12. Related Party Transactions Sales to Nishikawa Standard Company ("NISCO"), a 40% owned joint venture, totaled $11,570 and $10,850 for the three months ended March 31, 2013 and 2014, respectively. In March 2013, the Company received from NISCO a dividend of $4,000, consisting of $1,880 related to earnings and a $2,120 return on capital. In March 2014, the Company received from NISCO a dividend of $1,760, consisting of $809 related to earnings and a $951 return of capital. Purchases of materials from Guyoung Technology Co. Ltd ("Guyoung"), a Korean corporation of which the Company owned approximately 20% and 17% of the common stock at March 31, 2013 and 2014, respectively, totaled $690 and $441 for the three months ended March 31, 2013 and 2014, respectively. In March, 2014, the Company received from Guyoung a dividend of $224, all of which was related to earnings. The Company recorded an unrealized gain on investment of $1,849 for the three months ended March 31, 2014. At March 31, 2014, the amortized cost and fair value of the investment was $1,299 and $3,148, respectively.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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