Summary of significant accounting policies - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 9,100	$ 9,300
Current portion of allowance for doubtful accounts	$ 5,300	4,400
Weighted average amortization period of intangible assets, in years	15 years
Asset impairment charges	$ 6,966	19,110
Reserve for returns and allowances	7,200	4,200
Reserve for estimated rebates	$ 21,600	$ 18,100
Minimum | Intellectual property
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	5 years
Minimum | Customer relationships
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	8 years
Minimum | Distribution rights
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	10 years
Minimum | Trade names
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	5 years
Minimum | Non-complete agreement
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	3 years
Maximum | Intellectual property
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	20 years
Maximum | Customer relationships
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	27 years
Maximum | Distribution rights
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	17 years
Maximum | Trade names
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	30 years
Maximum | Non-complete agreement
Summary Of Significant Accounting Policies [Line Items]
Useful life of Intangible assets, in years	6 years
Building
Summary Of Significant Accounting Policies [Line Items]
Useful life of plant and equipment, in years	30 years
Machinery and Equipment | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful life of plant and equipment, in years	3 years
Machinery and Equipment | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful life of plant and equipment, in years	15 years
Computer Equipment and Software | Minimum
Summary Of Significant Accounting Policies [Line Items]
Useful life of plant and equipment, in years	3 years
Computer Equipment and Software | Maximum
Summary Of Significant Accounting Policies [Line Items]
Useful life of plant and equipment, in years	5 years
Customer Concentration Risk | Sales Revenue, Net | Hospitals And Healthcare Providers
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	88.00%
Customer Concentration Risk | Sales Revenue, Net | Other Medical Device Manufacturers
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	9.00%
Customer Concentration Risk | Sales Revenue, Net | Home Care Providers such as Pharmacies
Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	3.00%