Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Income before income taxes	$ 294,916	$ 256,335	$ 232,893
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Income Tax Expense (Benefit)	61,533	109,095	56,629
Deferred Income Tax Expense (Benefit)	1,252	(9,700)	2,166
Income tax expense	$ 62,785	$ 99,395	$ 58,795
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	21.00%	35.00%	35.00%
Income Tax Expense, Income Tax Reconciliation [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	$ 61,932	$ 89,684	$ 81,513
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	1,680	968	1,341
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other	3,457	5,648	3,482
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost	(13,750)	(4,845)	(1)
Effective Income tax reconciliation, other permanent differences	(6,141)	8,458	(4,929)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential	9,843	(24,270)	(18,432)
Effective Income Tax Reconciliation, Tax Contingencies, Foreign	3,737	8,426	2,490
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance	3,075	(30,224)	(8,163)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount	83	8,248	0
effective income tax rate reconciliation, global intangible low-taxed income	14,111
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		41,597
Effective Income Tax Rate Reconciliation, Other Adjustments	$ (2,980)	$ (4,295)	$ 1,494
Effective Income Tax Rate, Continuing Operations	21.30%	38.80%	25.20%
Components of Deferred Tax Assets and Liabilities [Abstract]
Deferred Tax Assets, Operating Loss Carryforwards	$ 32,564	$ 25,494
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	7,395	7,244
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities	17,242	14,621
Deferred tax assets, property, plant and equipment	16,377	14,984
Deferred tax assets, goodwill and intangible assets	10,619	13,866
Deferred tax assets, intercompany notes	6,913	9,596
Deferred tax assets, accrued revenue	36,273	32,947
Deferred Tax Assets, Other	11,876	9,631
Deferred Tax Assets, Gross	139,259	128,383
Deferred Tax Assets, Valuation Allowance	(21,857)	(20,257)
Deferred Tax Assets, Net	117,402	108,126
Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets	(22,877)	(29,361)
Deferred Tax Liabilities, Goodwill and Intangible Assets, Goodwill	(16,115)	(11,537)
Deferred tax liabilities, accrued expenses	(28,274)	(33,728)
Deferred tax liabilities, intercompany notes	(14,034)	(7,348)
Deferred tax liabilities, accrued interest	(32,372)	(27,449)
Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs	(8,299)	(7,020)
Deferred Tax Liabilities, Property, Plant and Equipment	(8,408)	(4,717)
Deferred tax liabilities, accrued revenue	(4,388)	(5,027)
Deferred Tax Liabilities, Other	(5,841)	(3,227)
Deferred Tax Liabilities, Gross	(140,608)	(129,414)
Deferred Tax Liabilities	(23,206)	(21,288)
Undistributed earnings of foreign subsidiaries indefinitely reinvested	1,477,500
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits Period Start	28,537	17,988
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	4,787	8,364
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	966	3,157
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	(1,705)	0
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities	(807)	(321)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	(863)	(651)
Unrecognized Tax Benefits Period End	30,915	28,537	$ 17,988
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	28,000	26,700
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	4,400	3,500
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Transition Tax for Accumulated Foreign Earning, Provisional Income Tax Expense (Benefit)		28,100
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Deferred Tax Liability, Provisional Income Tax (Expense) Benefit		13,500
Tax Cut and Jobs Act of 2017, Final Accounting, Adjustment to Income Tax Expense (Benefit)	(12,262)
UNITED STATES
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Income (Loss) before Income Taxes, United States	35,467	55,117	41,804
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Income Tax Expense (Benefit)	(8,711)	29,620	(2,886)
Deferred Income Tax Expense (Benefit)	6,871	14,056	9,908
Non-US [Member]
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Income before Income Taxes, Foreign	259,449	201,218	191,089
Foreign Tax Authority [Member]
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Income Tax Expense (Benefit)	70,244	79,475	59,515
Deferred Income Tax Expense (Benefit)	(5,619)	(23,756)	$ (7,742)
US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	109,821	90,200
Operating Loss Carryforward, Tax Effected	26,234
State and Local Jurisdiction [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	91,800	$ 59,100
Expiring in One Year [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	1,227
Operating Loss Carryforward, Tax Effected	296
Expiring in Two Years [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	1,926
Operating Loss Carryforward, Tax Effected	419
Expiring in Three Years [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	5,931
Operating Loss Carryforward, Tax Effected	1,361
Expiring in Four Years [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	1,847
Operating Loss Carryforward, Tax Effected	418
Expiring in Five Years [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	3,049
Operating Loss Carryforward, Tax Effected	699
Expiring in More than Five Years [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	58,772
Operating Loss Carryforward, Tax Effected	14,555
Not Subject to Expiration [Member] | US Federal and Foreign [Member]
Components of Deferred Tax Assets and Liabilities [Abstract]
Operating Loss Carryforwards	37,069
Operating Loss Carryforward, Tax Effected	$ 8,486