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Segment Information - Summary of Company's 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
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 113,649 | $ 119,217 | $ 114,842 | $ 97,153 | $ 105,411 | $ 108,413 | $ 108,915 | $ 98,139 | $ 444,861 | $ 420,878 | $ 378,212
Interest income |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 783 | 486 | 430
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (2,217) | (1,290) | (1,061)
Income taxes |  |  |  |  |  |  |  |  |  |  |
Income taxes |  |  |  |  |  |  |  |  | 8,122 | 6,007 | 13,152
Net income (loss) attributable to Preformed Line Products Company shareholders |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 5,624 | $ 7,951 | $ 7,904 | $ 1,824 | 5,264 | $ 9,054 | $ 6,735 | $ 5,528 | 23,303 | 26,581 | 12,654
Expenditure for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Expenditure for long-lived assets |  |  |  |  |  |  |  |  | 29,467 | 9,528 | 11,233
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 13,748 | 12,444 | 12,790
Identifiable assets |  |  |  |  |  |  |  |  |  |  |
Identifiable assets | 433,571 |  |  |  | 358,797 |  |  |  | 433,571 | 358,797 |
Long-lived assets |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 124,018 |  |  |  | 102,955 |  |  |  | 124,018 | 102,955 |
PLP-USA [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 178,301 | 169,040 | 147,646
Interest income |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 0 | 0 | 0
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (972) | (1,023) | (941)
Income taxes |  |  |  |  |  |  |  |  |  |  |
Income taxes |  |  |  |  |  |  |  |  | 3,299 | 367 | 7,142
Net income (loss) attributable to Preformed Line Products Company shareholders |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 8,054 | 9,900 | (2,367)
Expenditure for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Expenditure for long-lived assets |  |  |  |  |  |  |  |  | 4,928 | 3,672 | 4,474
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 5,393 | 5,452 | 5,389
Identifiable assets |  |  |  |  |  |  |  |  |  |  |
Identifiable assets | 127,428 |  |  |  | 118,171 |  |  |  | 127,428 | 118,171 |
Long-lived assets |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 51,097 |  |  |  | 51,506 |  |  |  | 51,097 | 51,506 |
The Americas [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 68,293 | 66,868 | 69,764
Interest income |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 412 | 273 | 283
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (466) | (111) | (10)
Income taxes |  |  |  |  |  |  |  |  |  |  |
Income taxes |  |  |  |  |  |  |  |  | 2,551 | 3,349 | 3,593
Net income (loss) attributable to Preformed Line Products Company shareholders |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 6,657 | 8,479 | 8,169
Expenditure for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Expenditure for long-lived assets |  |  |  |  |  |  |  |  | 2,864 | 1,746 | 1,272
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,862 | 1,488 | 1,985
Identifiable assets |  |  |  |  |  |  |  |  |  |  |
Identifiable assets | 71,908 |  |  |  | 69,764 |  |  |  | 71,908 | 69,764 |
Long-lived assets |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 15,874 |  |  |  | 14,847 |  |  |  | 15,874 | 14,847 |
EMEA [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 79,158 | 69,773 | 63,916
Interest income |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 192 | 102 | 47
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (149) | (58) | (31)
Income taxes |  |  |  |  |  |  |  |  |  |  |
Income taxes |  |  |  |  |  |  |  |  | 616 | 1,204 | 1,583
Net income (loss) attributable to Preformed Line Products Company shareholders |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 2,935 | 3,527 | 4,088
Expenditure for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Expenditure for long-lived assets |  |  |  |  |  |  |  |  | 5,304 | 1,591 | 2,329
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 2,528 | 1,808 | 1,678
Identifiable assets |  |  |  |  |  |  |  |  |  |  |
Identifiable assets | 97,126 |  |  |  | 57,263 |  |  |  | 97,126 | 57,263 |
Long-lived assets |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | 16,419 |  |  |  | 11,768 |  |  |  | 16,419 | 11,768 |
Asia-Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 119,109 | 115,197 | 96,886
Interest income |  |  |  |  |  |  |  |  |  |  |
Interest income |  |  |  |  |  |  |  |  | 179 | 111 | 100
Interest expense |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | (630) | (98) | (79)
Income taxes |  |  |  |  |  |  |  |  |  |  |
Income taxes |  |  |  |  |  |  |  |  | 1,656 | 1,087 | 834
Net income (loss) attributable to Preformed Line Products Company shareholders |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  | 5,657 | 4,675 | 2,764
Expenditure for long-lived assets |  |  |  |  |  |  |  |  |  |  |
Expenditure for long-lived assets |  |  |  |  |  |  |  |  | 16,371 | 2,519 | 3,158
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,965 | 3,696 | 3,738
Identifiable assets |  |  |  |  |  |  |  |  |  |  |
Identifiable assets | 137,109 |  |  |  | 113,599 |  |  |  | 137,109 | 113,599 |
Long-lived assets |  |  |  |  |  |  |  |  |  |  |
Long-lived assets | $ 40,628 |  |  |  | $ 24,834 |  |  |  | 40,628 | 24,834 |
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (32,626) | (34,699) | (27,520)
Intersegment Eliminations [Member] | PLP-USA [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (10,757) | (11,648) | (12,234)
Intersegment Eliminations [Member] | The Americas [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (7,774) | (9,480) | (5,570)
Intersegment Eliminations [Member] | EMEA [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (1,375) | (1,664) | (1,120)
Intersegment Eliminations [Member] | Asia-Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | $ (12,720) | $ (11,907) | $ (8,596)

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