Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Note 9 – Related party transactions: As discussed in our 2014 Annual Report, prior to 2014 we entered into an unsecured revolving demand promissory note with NL in which, as amended, we agreed to loan NL up to $40 million. The principal amount we might lend to NL at any time under such facility was at our discretion, and we made no loans to NL at any time since prior to 2014. In May 2015, we terminated such loan facility with NL.

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.