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Segment Information (Details) $ in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Sep. 30, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) | Dec. 31, 2018 USD ($) segment | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Segment Reporting [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  |  | 3 |  |  |
Proceeds from Sale of Property Held-for-sale | $ 17,500 |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Sale of Properties | $ 8,800 |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  | $ 241,845 | $ 284,178 | $ 308,007 | $ 244,779 | $ 231,681 | $ 262,476 | $ 263,002 | $ 219,867 | $ 1,078,809 | $ 977,025 | $ 860,661 |
Income from operations |  | 18,871 | 59,680 | 60,886 | 32,895 | 24,363 | 46,712 | 44,614 | 22,226 | 172,332 | 137,915 | 141,210 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 39,393 | 33,724 | 27,927 |
Impairment of goodwill |  | 6,686 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6,686 | 0 | 0 |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  |  |  |  |  |  | 0 | 6,336 | 0 |
Significant non-cash charges |  |  |  |  |  |  |  |  |  | 11,176 | 13,908 | 13,946 |
Provision for income taxes |  | 5,293 | $ 16,473 | $ 16,476 | $ 7,253 | 10,829 | $ 16,581 | $ 16,712 | $ 7,679 | 45,495 | 51,801 | 49,166 |
Capital expenditures and asset acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  | 31,317 | 85,962 | 47,363 |
Total assets |  | 1,021,663 |  |  |  | 1,037,523 |  |  |  | 1,021,663 | 1,037,523 | 979,974 |
Cash and short-term investments |  | 160,180 |  |  |  | 168,514 |  |  |  | 160,180 | 168,514 | 226,537 | $ 258,825
Administrative and all other |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 |
Income from operations |  |  |  |  |  |  |  |  |  | 8,865 | 901 | (178) |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 797 | 901 | 1,477 |
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 0 |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  |  |  |  |  |  |  | 0 |  |
Significant non-cash charges |  |  |  |  |  |  |  |  |  | 3,619 | 2,473 | 3,657 |
Provision for income taxes |  |  |  |  |  |  |  |  |  | 2,797 | 1,824 | 1,470 |
Capital expenditures and asset acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 |
Total assets |  | (280,430) |  |  |  | (150,970) |  |  |  | (280,430) | (150,970) | (64,091) |
Cash and short-term investments |  | 113,600 |  |  |  | 80,200 |  |  |  | 113,600 | 80,200 | 137,400 |
Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 32,344 | 24,911 | 31,772 |
North America |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 910,587 | 803,697 | 742,021 |
Income from operations |  |  |  |  |  |  |  |  |  | 164,453 | 132,995 | 137,466 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 30,505 | 25,745 | 19,433 |
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 0 |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  |  |  |  |  |  |  | 0 |  |
Significant non-cash charges |  |  |  |  |  |  |  |  |  | 6,340 | 9,861 | 9,124 |
Provision for income taxes |  |  |  |  |  |  |  |  |  | 39,638 | 47,434 | 45,547 |
Capital expenditures and asset acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  | 27,059 | 70,040 | 37,652 |
Total assets |  | 1,119,012 |  |  |  | 953,033 |  |  |  | 1,119,012 | 953,033 | 853,826 |
North America | Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 2,279 | 3,237 | 2,512 |
Europe |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 159,027 | 165,155 | 111,274 |
Income from operations |  |  |  |  |  |  |  |  |  | (3,026) | 2,723 | 2,115 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 6,297 | 5,832 | 5,809 |
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 6,686 |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  |  |  |  |  |  |  | 6,336 |  |
Significant non-cash charges |  |  |  |  |  |  |  |  |  | 1,169 | 1,509 | 1,052 |
Provision for income taxes |  |  |  |  |  |  |  |  |  | 2,947 | 2,124 | 1,428 |
Capital expenditures and asset acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  | 2,556 | 11,411 | 8,461 |
Total assets |  | 157,437 |  |  |  | 208,640 |  |  |  | 157,437 | 208,640 | 165,121 |
Europe | Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 1,773 | 959 | 570 |
Asia/Pacific |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 9,195 | 8,173 | 7,366 |
Income from operations |  |  |  |  |  |  |  |  |  | 2,040 | 1,296 | 1,807 |
Depreciation and amortization |  |  |  |  |  |  |  |  |  | 1,794 | 1,246 | 1,208 |
Impairment of goodwill |  |  |  |  |  |  |  |  |  | 0 |  |  |
Business Combination, Bargain Purchase, Gain Recognized, Amount |  |  |  |  |  |  |  |  |  |  | 0 |  |
Significant non-cash charges |  |  |  |  |  |  |  |  |  | 48 | 65 | 113 |
Provision for income taxes |  |  |  |  |  |  |  |  |  | 113 | 419 | 721 |
Capital expenditures and asset acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  | 1,702 | 4,511 | 1,250 |
Total assets |  | 25,644 |  |  |  | $ 26,820 |  |  |  | 25,644 | 26,820 | 25,118 |
Asia/Pacific | Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  | 28,292 | $ 20,715 | $ 28,690 |
Foreign operating entities |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Information |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and short-term investments |  | $ 45,500 |  |  |  |  |  |  |  | $ 45,500 |  |  |
Percentage of cash and cash equivalents |  | 28.40% |  |  |  |  |  |  |  | 28.40% |  |  |

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