Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Tax Credit Carryforward [Line Items]
Discrete tax expense for migration of acquired intellectual property	0.00%	18.00%	0.00%
Reserve for tax uncertainties	$ 13,952,000	$ 11,591,000	$ 7,294,000
Discrete tax benefit for changes to international tax structure		87,500,000
Foreign tax structure deferred tax asset		437,500,000
GILTI tax basis differences	339,325,000	350,000,000
Domestic income from continuing operations before taxes	39,425,000	31,396,000	39,042,000
Foreign income from continuing operations before taxes	$ 147,486,000	$ 131,598,000	$ 195,532,000
Income tax rate	21.00%	21.00%	21.00%
Cash	$ 266,609,000	$ 155,498,000
Foreign tax rate differential	6.00%	9.00%	9.00%
Reduction of income tax expense for adoption of ASU 2016-09	$ 12,788,000	$ 6,472,000	$ 8,488,000
Discrete tax benefit related to employee stock option exercises	7.00%	4.00%	4.00%
Net cash provided by operating activities	$ 242,400,000	$ 253,311,000	$ 223,454,000
Net cash used in financing activities	316,868,000	32,233,000	209,904,000
Income tax penalties and interest expense	340,000	116,000	91,000
Reserve for income taxes	14,257,000	11,563,000
Unrecognized tax benefit shown as a reduction to noncurrent deferred tax assets	1,028,000	1,028,000
Interest and penalties, gross	1,332,000	1,000,000
Minimum decrease in income tax expense due to release in reserves	1,900,000
Maximum decrease in income tax expense due to release in reserves	2,000,000
Deferred tax assets, valuation allowance	8,568,000	7,312,000
Income tax paid net	33,695,000	13,443,000	41,430,000
Effective income tax rate reconciliation, tax settlement, other, amount	307,000	1,932,000	1,847,000
Tax cuts and jobs act, measurement period adjustment, income tax expense (benefit)			3,240,000
Tax cuts and jobs act, transition tax for accumulated foreign earnings, income tax expense			11,028,000
Tax cuts and jobs act, transition tax for accumulated foreign earnings, liability			$ 90,351,000
Deferred tax liabilities		332,344,000
Unrecognized Tax Benefits, Gross	15,285,000	12,591,000
Foreign Tax Benefit - Gains Taxed Outside U.S. [Member]
Tax Credit Carryforward [Line Items]
1. Effective income tax rate reconciliation, tax settlement, foreign, amount	13,984,000
Foreign Tax Expense - Transfer Price Adjustment [Member]
Tax Credit Carryforward [Line Items]
1. Effective income tax rate reconciliation, tax settlement, foreign, amount	3,267,000
Discrete Tax Expense - Foreign Tax Filing Adjustments [Member]
Tax Credit Carryforward [Line Items]
1. Effective income tax rate reconciliation, tax settlement, foreign, amount	843,000
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Deferred tax assets, valuation allowance	8,568,000
State Research And Experimentation [Member]
Tax Credit Carryforward [Line Items]
Deferred tax assets, tax credit carryforwards, research	$ 11,361,000
Foreign Tax Authority [Member] | Revenue Commissioners, Ireland [Member]
Tax Credit Carryforward [Line Items]
Income tax rate	12.50%
Foreign Tax Authority [Member] | State Administration of Taxation, China [Member]
Tax Credit Carryforward [Line Items]
Income tax rate	25.00%
Domestic Tax Authority [Member]
Tax Credit Carryforward [Line Items]
Income tax rate	21.00%
Sualab Co., Ltd. [Member]
Tax Credit Carryforward [Line Items]
Reserve for tax uncertainties		3,700,000
Effective Income Tax Rate Reconciliation, Migration of Acquired Intellectual Property Dollar		$ 28,528,000