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General and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2021
Accounting Policies [Abstract] |
Schedule of Inventory, Current [Table Text Block] | Inventories consist of the following (in thousands):
| As of December 31,
| 2021 |  | 2020
Raw materials | $ | 135,528 |  |  | $ | 126,499 |
Work in process | 36,490 |  |  | 33,053 |
Finished goods | 118,217 |  |  | 155,376 |
Total | $ | 290,235 |  |  | $ | 314,928 |
Property, Plant and Equipment [Table Text Block] | Property, plant and equipment consists of the following (in thousands):
| As of December 31,
| 2021 |  | 2020
Machinery and equipment | $ | 321,078 |  |  | $ | 291,331 |
Land, building and building improvements | 243,377 |  |  | 241,199 |
Molds | 60,463 |  |  | 60,381 |
Computer equipment and software | 102,979 |  |  | 98,311 |
Furniture and fixtures | 7,670 |  |  | 7,767 |
Instruments placed with customers(1) | 97,384 |  |  | 90,383 |
Construction in progress | 72,153 |  |  | 53,724 |
Total property, plant and equipment, cost | 905,104 |  |  | 843,096 |
Accumulated depreciation | (436,739) |  |  | (376,468) |
Property, plant and equipment, net | $ | 468,365 |  |  | $ | 466,628 |
_______________________________ (1) Instruments placed with customers consist of drug-delivery and monitoring systems placed with customers under operating leases. All property, plant and equipment are stated at cost. We use the straight-line method for depreciating property, plant and equipment over their estimated useful lives. Estimated useful lives are:
Buildings | 15 - 30 years
Building improvements | 15 - 30 years
Machinery, equipment and molds | 2 - 15 years
Furniture, fixtures and office equipment | 2 - 5 years
Computer equipment and software | 3 - 5 years
Instruments placed with customers | 3 - 10 years
Schedule of Goodwill | The following table presents the changes in the carrying amount of our goodwill for 2021, 2020 and 2019 (in thousands):
|  | Total
Balance as of January 1, 2019 |  | $ | 11,195 |
Goodwill acquired(1) |  | 20,026 |
Other |  | 24 |
Balance as of December 31, 2019 |  | $ | 31,245 |
Other(2) |  | 1,756 |
Balance as of December 31, 2020 |  | 33,001 |
Goodwill(3) |  | 10,626 |
Currency translation |  | (188) |
Balance as of December 31, 2021 |  | $ | 43,439 |
_______________________________ (1) In 2019, we acquired Pursuit Vascular, Inc. ("Pursuit"), which resulted in $19.1 million of goodwill. We also acquired a small foreign distributor, which resulted in $0.9 million of goodwill. (2) In 2020, "Other" relates to a $1.3 million measurement period adjustment to deferred taxes related to the Pursuit acquisition and foreign currency translation. (3) In 2021, we acquired a small foreign infusion systems supplier, which resulted in $10.6 million of goodwill.
Schedule of Indefinite-Lived Intangible Assets | Intangible assets, carried at cost less accumulated amortization and amortized on a straight-lined basis, were as follows (in thousands):
|  | Weighted-Average Amortization Life in Years |  | December 31, 2021
|  |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 27,429 |  |  | $ | 16,764 |  |  | $ | 10,665 |
Customer contracts |  | 12 |  | 10,412 |  |  | 6,196 |  |  | 4,216 |
Non-contractual customer relationships |  | 9 |  | 57,316 |  |  | 33,004 |  |  | 24,312 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 18,260 |  |  | 4,731 |  |  | 13,529 |
Developed technology |  | 13 |  | 152,893 |  |  | 49,406 |  |  | 103,487 |
Non-compete |  | 3 |  | 9,100 |  |  | 2,356 |  |  | 6,744 |
Total amortized intangible assets |  |  |  | $ | 275,835 |  |  | $ | 112,882 |  |  | $ | 162,953 |
Internally developed software* |  |  |  | $ | 25,358 |  |  |  |  | $ | 25,358 |
Total intangible assets |  |  |  | $ | 301,193 |  |  | $ | 112,882 |  |  | $ | 188,311 |
_______________________________ * Internally developed software will be amortized when the projects are complete and the assets are ready for their intended use.
|  | Weighted-Average Amortization Life in Years |  | December 31, 2020
|  |  | Cost |  | Accumulated Amortization |  | Net
Patents |  | 10 |  | $ | 24,797 |  |  | $ | 15,056 |  |  | $ | 9,741 |
Customer contracts |  | 12 |  | 10,365 |  |  | 5,852 |  |  | 4,513 |
Non-contractual customer relationships |  | 9 |  | 58,061 |  |  | 26,711 |  |  | 31,350 |
Trademarks |  | 4 |  | 425 |  |  | 425 |  |  | — |
Trade name |  | 15 |  | 18,270 |  |  | 3,500 |  |  | 14,770 |
Developed technology |  | 13 |  | 152,893 |  |  | 36,927 |  |  | 115,966 |
Non-compete |  | 3 |  | 2,500 |  |  | 972 |  |  | 1,528 |
Total amortized intangible assets |  |  |  | $ | 267,311 |  |  | $ | 89,443 |  |  | $ | 177,868 |
Internally developed software* |  |  |  | $ | 19,363 |  |  |  |  | $ | 19,363 |
Total intangible assets |  |  |  | $ | 286,674 |  |  | $ | 89,443 |  |  | $ | 197,231 |
_______________________________ * Internally developed software will be amortized when the projects are complete and the assets are ready for their intended use.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] | As of December 31, 2021, estimated annual amortization for our intangible assets for each of the next five years is approximately (in thousands):
2022 |  | $ | 25,668 |
2023 |  | 24,191 |
2024 |  | 23,551 |
2025 |  | 16,057 |
2026 |  | 15,324 |
Thereafter |  | 58,162 |
Total |  | $ | 162,953 |
Debt Securities, Available-for-sale | Our short-term and long-term investments in available-for-sale securities consist of the following (in thousands):
| As of December 31, 2021
| Amortized Cost |  | Unrealized Holding Gains (Losses) |  | Fair Value
Short-term corporate bonds | $ | 14,420 |  |  | $ | — |  |  | $ | 14,420 |
Long-term corporate bonds | 4,620 |  |  | — |  |  | 4,620 |
Total investment securities | $ | 19,040 |  |  | $ | — |  |  | $ | 19,040 |
| As of December 31, 2020
| Amortized Cost |  | Unrealized Holding Gains (Losses) |  | Fair Value
Short-term corporate bonds | $ | 14,687 |  |  | $ | — |  |  | $ | 14,687 |
Long-term corporate bonds | 12,974 |  |  | — |  |  | 12,974 |
Total investment securities | $ | 27,661 |  |  | $ | — |  |  | $ | 27,661 |
Equity Method Investments | Our non-marketable equity method investment consists of the following (in thousands):
| As of December 31,
| 2021 |  | 2020
Equity method investment | $ | 3,238 |  |  | $ | — |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted (in thousands, except per share data):
|  | Year ended December 31,
|  | 2021 |  | 2020 |  | 2019
Net income |  | $ | 103,135 |  |  | $ | 86,870 |  |  | $ | 101,035 |
Weighted-average number of common shares outstanding (basic) |  | 21,206 |  |  | 20,907 |  |  | 20,629 |
Dilutive securities |  | 575 |  |  | 684 |  |  | 916 |
Weighted-average common and common equivalent shares outstanding (diluted) |  | 21,781 |  |  | 21,591 |  |  | 21,545 |
EPS — basic |  | $ | 4.86 |  |  | $ | 4.16 |  |  | $ | 4.90 |
EPS — diluted |  | $ | 4.74 |  |  | $ | 4.02 |  |  | $ | 4.69 |

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