Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) plan	Dec. 31, 2019 USD ($) plan	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Standard product warranty period		1 year
Deposits with foreign banks	$ 89,300,000	$ 89,300,000	$ 77,500,000
Sales demonstration inventory turnover period (up to)		3 years
Refurbished sales demonstration inventory turnover period		12 months
Service inventory turnover period		12 months
Service inventory not for sale, useful life		3 years
Reserve percentage of FIFO obsolete and excess inventory	100.00%	100.00%
Depreciation expense		$ 13,000,000.0	12,900,000	$ 12,300,000
Impairment of goodwill		21,233,000	0	0
Indefinite-lived intangible assets	$ 0	$ 0	0
Intangible assets weighted-average amortization period		4 years
Assets impairment charges	$ 35,200,000	$ 35,213,000	$ 0	$ 0
Warranty term		1 year
Number of compensation plans | plan	2	2
Operating lease right-of-use asset	$ 18,418,000	$ 18,418,000
Lease liability	19,621,000	19,621,000
2019 Acquisitions
Summary Of Significant Accounting Policies [Line Items]
Assets impairment charges	10,500,000	$ 10,500,000
Performance Shares
Summary Of Significant Accounting Policies [Line Items]
Vesting period, years		3 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Account receivable period due		30 days
Other intangible assets, useful life		3 years
Minimum | Product technology and patents
Summary Of Significant Accounting Policies [Line Items]
Other intangible assets, useful life		7 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Account receivable period due		90 days
Other intangible assets, useful life		20 years
Maximum | Product technology and patents
Summary Of Significant Accounting Policies [Line Items]
Other intangible assets, useful life		20 years
Accounting Standards Update 2016-02 | Minimum
Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use asset	18,400,000	$ 18,400,000
Accounting Standards Update 2016-02 | Maximum
Summary Of Significant Accounting Policies [Line Items]
Lease liability	19,600,000	19,600,000
Property, Plant and Equipment | Accounting Standards Update 2016-02 | Maximum
Summary Of Significant Accounting Policies [Line Items]
Lease liability	800,000	800,000
Finance Lease | Accounting Standards Update 2016-02 | Maximum
Summary Of Significant Accounting Policies [Line Items]
Lease liability	$ 800,000	$ 800,000