Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2013
Related Party Transactions [Abstract]
Related Party Transactions	14. Related Party Transactions Sales to NISCO, a 40% owned joint venture, totaled $7,472 and $11,694 for the three months ended September 30, 2012 and 2013, respectively, and $31,491 and $35,528 for the nine months ended September 30, 2012 and 2013, respectively. In March 2012, the Company received from NISCO a dividend of $800, all of which was related to earnings. 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 of capital. Purchases of materials from Guyoung Technology Co. Ltd, a Korean corporation of which the Company owns approximately 20% of the common stock, totaled $743 and $672 for the three months ended September 30, 2012 and 2013, respectively, and $2,340 and $2,032 for the nine months ended September 30, 2012 and 2013, 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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