Business Combinations (Contingent Consideration) (Details) - USD ($) $ in Thousands	Apr. 04, 2018	Jan. 16, 2018	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Contingent consideration			$ 114,396	$ 161,381
ImThera Medical, Inc.
Business Acquisition [Line Items]
Regulatory milestone-based payments		$ 50,429
Sales-based earnout		62,315
Contingent consideration		$ 112,744
TandemLife
Business Acquisition [Line Items]
Regulatory milestone-based payments	$ 40,190
Minimum | Monte Carlo simulation | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		85.00%
Maximum | Monte Carlo simulation | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		95.00%
Discount rate | Minimum | Discounted cash flow | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		4.30%
Discount rate | Minimum | Discounted cash flow | TandemLife
Business Acquisition [Line Items]
Contingent consideration, measurement inputs	4.20%
Discount rate | Maximum | Discounted cash flow | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		4.70%
Discount rate | Maximum | Discounted cash flow | TandemLife
Business Acquisition [Line Items]
Contingent consideration, measurement inputs	4.80%
Probability of payment | Minimum | Discounted cash flow | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		85.00%
Probability of payment | Minimum | Discounted cash flow | TandemLife
Business Acquisition [Line Items]
Contingent consideration, measurement inputs	75.00%
Probability of payment | Maximum | Discounted cash flow | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		95.00%
Probability of payment | Maximum | Discounted cash flow | TandemLife
Business Acquisition [Line Items]
Contingent consideration, measurement inputs	95.00%
Risk-adjusted discount rate | Monte Carlo simulation | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		11.50%
Credit risk discount rate | Minimum | Monte Carlo simulation | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		4.70%
Credit risk discount rate | Maximum | Monte Carlo simulation | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		5.80%
Revenue volatility | Monte Carlo simulation | ImThera Medical, Inc.
Business Acquisition [Line Items]
Contingent consideration, measurement inputs		29.30%