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Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 23, 2018 | Feb. 14, 2018 | Oct. 02, 2017 | Aug. 04, 2017 | Jul. 03, 2017 | May 01, 2017 | Jan. 31, 2017 | Jul. 06, 2016 | Feb. 04, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 14, 2018 | Nov. 13, 2018 | Jan. 31, 2018
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  | $ 335,433 | $ 238,147 | $ 211,927 |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on bargain purchase |  |  |  |  |  |  |  |  |  | $ 0 | $ (11,039) | $ 0 |  |  |
Vascular Insights |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,308 |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  | 21,832 |  |
Total assets acquired |  |  |  |  |  |  |  |  |  |  |  |  | 58,220 |  |
Vascular Insights | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  | 32,830 |  |
Vascular Insights | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  | 840 |  |
Vascular Insights | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,410 |  |
Cianna Medical, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,151 |
Inventories |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,803 |
Prepaid expenses and other assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 315 |
Property and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,047 |
Other long-term assets |  |  |  |  |  |  |  |  |  |  |  |  |  | 14 |
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  | 65,885 |
Total assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 224,135 |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade payables |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,497) |
Accrued expenses |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,384) |
Deferred income tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | (30,363) |
Other long-term liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,527) |
Total liabilities assumed |  |  |  |  |  |  |  |  |  |  |  |  |  | (35,771) |
Total net assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  | 188,364 |
Cianna Medical, Inc. | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  | 134,510 |
Cianna Medical, Inc. | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,330 |
Cianna Medical, Inc. | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,080 |
DirectACCESS Medical, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories | $ 971 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 938 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets acquired | 7,269 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price | 7,300 |  |  |  |  |  |  |  |  |  |  |  |  |  |
DirectACCESS Medical, LLC | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles | 4,840 |  |  |  |  |  |  |  |  |  |  |  |  |  |
DirectACCESS Medical, LLC | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles | 120 |  |  |  |  |  |  |  |  |  |  |  |  |  |
DirectACCESS Medical, LLC | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles | $ 400 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Becton, Dickinson and Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  | $ 5,804 |  |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  | 748 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | 9,728 |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets acquired |  | 101,880 |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  | 100,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Becton, Dickinson and Company | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  | 74,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Becton, Dickinson and Company | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  | 4,200 |  |  |  |  |  |  |  |  |  |  |  |  |
Becton, Dickinson and Company | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  | 4,900 |  |  |  |  |  |  |  |  |  |  |  |  |
Becton, Dickinson and Company | In Process Research and Development |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  | $ 2,500 |  |  |  |  |  |  |  |  |  |  |  |  |
ITL Healthcare Pty Ltd |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables |  |  | $ 1,287 |  |  |  |  |  |  |  |  |  |  |  |
Other receivables |  |  | 56 |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  | 1,808 |  |  |  |  |  |  |  |  |  |  |  |
Prepaid expenses and other assets |  |  | 65 |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  | 1,053 |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  | 3,945 |  |  |  |  |  |  |  |  |  |  |  |
Total assets acquired |  |  | 14,154 |  |  |  |  |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade payables |  |  | (216) |  |  |  |  |  |  |  |  |  |  |  |
Accrued expenses |  |  | (747) |  |  |  |  |  |  |  |  |  |  |  |
Deferred income tax liabilities |  |  | (1,901) |  |  |  |  |  |  |  |  |  |  |  |
Total liabilities assumed |  |  | (2,864) |  |  |  |  |  |  |  |  |  |  |  |
Total net assets acquired |  |  | 11,290 |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  | 11,300 |  |  |  |  |  |  |  |  |  |  |  |
ITL Healthcare Pty Ltd | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  | $ 5,940 |  |  |  |  |  |  |  |  |  |  |  |
Laurane Medical S.A.S. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  | $ 594 |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | 6,366 |  |  |  |  |  |  |  |  |  |  |
Total assets acquired |  |  |  | 22,000 |  |  |  |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  | 16,500 |  |  |  |  |  |  |  |  |  |  |
Laurane Medical S.A.S. | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  | 14,920 |  |  |  |  |  |  |  |  |  |  |
Laurane Medical S.A.S. | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  | $ 120 |  |  |  |  |  |  |  |  |  |  |
Osseon LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  | $ 979 |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  | 58 |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | 203 |  |  |  |  |  |  |  |  |  |
Total assets acquired |  |  |  |  | 6,840 |  |  |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  | 6,800 |  |  |  |  |  |  |  |  |  |
Osseon LLC | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  | 5,400 |  |  |  |  |  |  |  |  |  |
Osseon LLC | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  | $ 200 |  |  |  |  |  |  |  |  |  |
Vascular Access Technologies, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 4,281 |  |  |  |  |  |  |  |  |
Total assets acquired |  |  |  |  |  | 9,900 |  |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income tax liabilities |  |  |  |  |  | (3,101) |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  | 5,000 |  |  |  |  |  |  |  |  |
Vascular Access Technologies, Inc. | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  | 7,800 |  |  |  |  |  |  |  |  |
Vascular Access Technologies, Inc. | In Process Research and Development |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  | $ 920 |  |  |  |  |  |  |  |  |
Argon Medical Devices, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  | $ 1,436 |  |  |  |  |  |  |  |
Trade receivables |  |  |  |  |  |  | 8,351 |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  | 11,222 |  |  |  |  |  |  |  |
Prepaid expenses and other assets |  |  |  |  |  |  | 1,275 |  |  |  |  |  |  |  |
Income tax refund receivable |  |  |  |  |  |  | 165 |  |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  | 2,319 |  |  |  |  |  |  |  |
Deferred tax assets |  |  |  |  |  |  | 202 |  |  |  |  |  |  |  |
Total assets acquired |  |  |  |  |  |  | 29,570 |  |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade payables |  |  |  |  |  |  | (2,414) |  |  |  |  |  |  |  |
Accrued expenses |  |  |  |  |  |  | (5,083) |  |  |  |  |  |  |  |
Income taxes payable |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Deferred income tax liabilities |  |  |  |  |  |  | (934) |  |  |  |  |  |  |  |
Total liabilities assumed |  |  |  |  |  |  | (8,431) |  |  |  |  |  |  |  |
Total net assets acquired |  |  |  |  |  |  | 21,139 |  |  |  |  |  |  |  |
Gain on bargain purchase |  |  |  |  |  |  | (11,039) |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  | 10,100 |  |  |  |  |  |  |  |
Argon Medical Devices, Inc. | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  | 2,200 |  |  |  |  |  |  |  |
Argon Medical Devices, Inc. | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  | 1,500 |  |  |  |  |  |  |  |
Argon Medical Devices, Inc. | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  | 900 |  |  |  |  |  |  |  |
Catheter Connections, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 958
Inventories |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,157
Prepaid expenses and other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 85
Property and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,472
Goodwill |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,989
Total assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,361
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade payables |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (338)
Accrued expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (23)
Total liabilities assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (361)
Total net assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 38,000
Total purchase price |  |  |  |  |  |  | $ 38,000 |  |  |  |  |  |  |  |
Catheter Connections, Inc. | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,100
Catheter Connections, Inc. | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700
Catheter Connections, Inc. | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,900
DFINE, Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables |  |  |  |  |  |  |  | $ 4,054 |  |  |  |  |  |  |
Other receivables |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  |  | 8,585 |  |  |  |  |  |  |
Prepaid expenses and other assets |  |  |  |  |  |  |  | 630 |  |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  |  | 1,630 |  |  |  |  |  |  |
Other long-term assets |  |  |  |  |  |  |  | 145 |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  | 24,818 |  |  |  |  |  |  |
Total assets acquired |  |  |  |  |  |  |  | 114,268 |  |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trade payables |  |  |  |  |  |  |  | (1,790) |  |  |  |  |  |  |
Accrued expenses |  |  |  |  |  |  |  | (5,298) |  |  |  |  |  |  |
Deferred income tax liabilities |  |  |  |  |  |  |  | (701) |  |  |  |  |  |  |
Deferred income tax liabilities - noncurrent |  |  |  |  |  |  |  | (10,844) |  |  |  |  |  |  |
Total liabilities assumed |  |  |  |  |  |  |  | (18,633) |  |  |  |  |  |  |
Total net assets acquired |  |  |  |  |  |  |  | 95,635 |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  | 97,500 |  |  |  |  |  |  |
Cash received |  |  |  |  |  |  |  | 1,327 |  |  |  |  |  |  |
DFINE, Inc. | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  | 67,600 |  |  |  |  |  |  |
DFINE, Inc. | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  | 2,400 |  |  |  |  |  |  |
DFINE, Inc. | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  | $ 4,400 |  |  |  |  |  |  |
HeRO®Graft |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  |  |  |  | $ 2,455 |  |  |  |  |  |
Property and equipment |  |  |  |  |  |  |  |  | 290 |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  | 2,555 |  |  |  |  |  |
Total assets acquired |  |  |  |  |  |  |  |  | 18,500 |  |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  |  | 18,500 |  |  |  |  |  |
HeRO®Graft | Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  | 12,100 |  |  |  |  |  |
HeRO®Graft | Customer lists |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  | 400 |  |  |  |  |  |
HeRO®Graft | Trademarks |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangibles |  |  |  |  |  |  |  |  | $ 700 |  |  |  |  |  |

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