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Marketable Securities | 9 Months Ended
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Sep. 30, 2016
Investments Debt And Equity Securities [Abstract] |
Marketable Securities | Note 4 – Marketable securities:
| Fair value measurement level |  | Market value |  |  | Cost basis |  |  | Unrealized gain (loss) |
|  |  | (In thousands) |
December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |
Valhi common stock | 1 |  | $ | 19,260 |  |  | $ | 24,347 |  |  | $ | (5,087 | )
September 30, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |
Valhi common stock | 1 |  | $ | 33,058 |  |  | $ | 24,347 |  |  | $ | 8,711 |
At December 31, 2015 and September 30, 2016, we held approximately 14.4 million shares of common stock of our immediate parent company, Valhi. See Note 1. We account for our investment in Valhi common stock as available-for-sale marketable equity securities and any unrealized gains or losses on the securities are recognized through other comprehensive income, net of deferred income taxes. Our shares of Valhi common stock are carried at fair value based on quoted market prices, representing a Level 1 input within the fair value hierarchy. At December 31, 2015 and September 30, 2016, the quoted per share market price of Valhi common stock was $1.34 and $2.30, respectively. The Valhi common stock we own is subject to the restrictions on resale pursuant to certain provisions of the SEC Rule 144. In addition, as a majority-owned subsidiary of Valhi, we cannot vote our shares of Valhi common stock under Delaware General Corporation Law, but we do receive dividends from Valhi on these shares, when declared and paid.

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