Investment in Kronos Worldwide, Inc. - Changes in Carrying Value of Investment (Detail) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Balance at the beginning of the year |
$ 140,695
|
|
|
| Equity in earnings (losses) of Kronos |
13,171
|
$ (52,770)
|
$ 30,161
|
| Dividends received from Kronos |
(21,132)
|
(21,132)
|
(21,132)
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Balance at the end of the year |
120,346
|
140,695
|
|
| Defined Benefit Pension Plans |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
1,596
|
(1,033)
|
(8,585)
|
| OPEB |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
(430)
|
(386)
|
(1,205)
|
| Kronos |
|
|
|
| Balance at the beginning of the year |
140,700
|
237,700
|
284,500
|
| Equity in earnings (losses) of Kronos |
13,200
|
(52,800)
|
30,200
|
| Dividends received from Kronos |
(21,100)
|
(21,100)
|
(21,100)
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Marketable securities |
700
|
700
|
(4,200)
|
| Currency translation |
(5,400)
|
(28,000)
|
(31,300)
|
| Interest rate swap |
100
|
(700)
|
|
| Balance at the end of the year |
120,300
|
140,700
|
237,700
|
| Kronos | Defined Benefit Pension Plans |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
(7,800)
|
$ 4,900
|
(20,100)
|
| Kronos | OPEB |
|
|
|
| Equity in Kronos' other comprehensive income (loss): |
|
|
|
| Defined benefit pension plans/ Other postretirement benefit plans |
$ (100)
|
|
$ (300)
|