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Operating Segments and Geographic Information (Information About Reportable Segments) (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 193,768 | $ 221,842 | $ 242,852 | $ 239,798 | $ 222,942 | $ 226,863 | $ 214,675 | $ 214,611 | $ 898,260 | $ 879,091 | $ 821,043
Total net sales |  |  |  |  |  |  |  |  |  |  | 821,043
Operating income |  |  |  |  |  |  |  |  | 110,481 | 112,711 | 129,139
Total assets | 1,273,181 |  |  |  | 1,279,344 |  |  |  | 1,273,181 | 1,279,344 | 1,125,134
Capital expenditures |  |  |  |  |  |  |  |  | 51,597 | 90,549 | 27,215
Depreciation & amortization |  |  |  |  |  |  |  |  | 49,162 | 50,073 | 44,099
Investment in unconsolidated joint ventures | 16,461 |  |  |  | 18,667 |  |  |  | 16,461 | 18,667 | 18,324
Equity income in unconsolidated joint ventures |  |  |  |  |  |  |  |  | 5,319 | 5,501 | 4,898
Advanced Connectivity Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 316,592 | 294,154 | 301,092
Total net sales |  |  |  |  |  |  |  |  |  |  | 301,092
Operating income |  |  |  |  |  |  |  |  | 48,654 | 33,827 | 55,410
Total assets | 402,398 |  |  |  | 396,075 |  |  |  | 402,398 | 396,075 | 353,786
Capital expenditures |  |  |  |  |  |  |  |  | 22,156 | 61,425 | 9,900
Depreciation & amortization |  |  |  |  |  |  |  |  | 18,267 | 20,121 | 16,351
Investment in unconsolidated joint ventures | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Equity income in unconsolidated joint ventures |  |  |  |  |  |  |  |  | 0 | 0 | 0
Elastomeric Material Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 361,603 | 341,364 | 312,661
Total net sales |  |  |  |  |  |  |  |  |  |  | 312,661
Operating income |  |  |  |  |  |  |  |  | 57,080 | 52,502 | 50,908
Total assets | 569,484 |  |  |  | 588,841 |  |  |  | 569,484 | 588,841 | 489,456
Capital expenditures |  |  |  |  |  |  |  |  | 8,550 | 10,917 | 7,563
Depreciation & amortization |  |  |  |  |  |  |  |  | 19,887 | 18,501 | 16,270
Investment in unconsolidated joint ventures |  |  |  |  | 18,667 |  |  |  |  | 18,667 | 18,324
Equity income in unconsolidated joint ventures |  |  |  |  |  |  |  |  |  | 5,501 | 4,898
Power Electronics Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 198,535 | 223,338 | 184,954
Total net sales |  |  |  |  |  |  |  |  |  |  | 184,954
Operating income |  |  |  |  |  |  |  |  | (1,437) | 19,648 | 15,668
Total assets | 278,763 |  |  |  | 273,212 |  |  |  | 278,763 | 273,212 | 261,034
Capital expenditures |  |  |  |  |  |  |  |  | 20,191 | 18,051 | 9,238
Depreciation & amortization |  |  |  |  |  |  |  |  | 10,260 | 10,640 | 10,572
Investment in unconsolidated joint ventures | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Equity income in unconsolidated joint ventures |  |  |  |  |  |  |  |  | 0 | 0 | 0
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 21,530 | 20,235 | 22,336
Total net sales |  |  |  |  |  |  |  |  |  |  | 22,336
Operating income |  |  |  |  |  |  |  |  | 6,184 | 6,734 | 7,153
Total assets | 22,536 |  |  |  | 21,216 |  |  |  | 22,536 | 21,216 | 20,858
Capital expenditures |  |  |  |  |  |  |  |  | 700 | 156 | 514
Depreciation & amortization |  |  |  |  |  |  |  |  | 748 | 811 | 906
Investment in unconsolidated joint ventures | $ 0 |  |  |  | $ 0 |  |  |  | 0 | 0 | 0
Equity income in unconsolidated joint ventures |  |  |  |  |  |  |  |  | 0 | 0 | $ 0
Transferred over Time |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 228,501 | 244,657 |
Transferred over Time | Advanced Connectivity Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 0 | 0 |
Transferred over Time | Elastomeric Material Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 12,687 | 5,788 |
Transferred over Time | Power Electronics Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 197,702 | 221,896 |
Transferred over Time | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 18,112 | 16,973 |
Transferred at a point in time |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 669,759 | 634,434 |
Transferred at a point in time | Advanced Connectivity Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 316,592 | 294,154 |
Transferred at a point in time | Elastomeric Material Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 348,916 | 335,576 |
Transferred at a point in time | Power Electronics Solutions |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 833 | 1,442 |
Transferred at a point in time | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ 3,418 | $ 3,262 |

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