Investment in Kronos Worldwide, Inc. - Changes in Carrying Value of Investment (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Balance at the beginning of the year |
$ 237,719
|
|
|
| Equity in earnings (losses) of Kronos |
(52,770)
|
$ 30,161
|
$ (31,007)
|
| Dividends received from Kronos |
(21,132)
|
(21,132)
|
(21,132)
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Currency translation |
(18,211)
|
(20,357)
|
1,349
|
| Interest rate swap |
(445)
|
|
|
| Balance at the end of the year |
140,695
|
237,719
|
|
| Defined Benefit Pension Plans |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
2,548
|
(18,616)
|
9,758
|
| OPEB |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
(294)
|
(993)
|
380
|
| Kronos |
|
|
|
| Balance at the beginning of the year |
237,700
|
284,500
|
323,100
|
| Equity in earnings (losses) of Kronos |
(52,800)
|
30,200
|
(31,000)
|
| Dividends received from Kronos |
(21,100)
|
(21,100)
|
(21,100)
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Marketable securities |
700
|
(4,200)
|
2,000
|
| Currency translation |
(28,000)
|
(31,300)
|
2,000
|
| Interest rate swap |
(700)
|
|
|
| Other |
|
|
(200)
|
| Balance at the end of the year |
140,700
|
237,700
|
284,500
|
| Kronos | Defined Benefit Pension Plans |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
$ 4,900
|
(20,100)
|
8,500
|
| Kronos | OPEB |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
|
$ (300)
|
$ 1,200
|