6. Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Line Items]
Prepaid Taxes	$ 12,700
U.S.	(38,500)	$ 48,400	$ 30,600
International	80,100	97,400	101,000
Income before income taxes	41,560	145,847	131,557
U.S. Federal	16,100	8,700	9,600
State	3,100	1,700	3,800
International	30,300	34,100	35,600
Current Income Tax Expense (Benefit)	49,500	44,500	49,000
U.S. Federal	(42,400)	(200)	1,500
State	(2,800)	1,200	(200)
International	(6,000)	(7,100)	(7,300)
Deferred tax benefit	(51,200)	(6,100)	(6,000)
Non-current tax expense (benefit)	15,100	(5,600)	(300)
Provision for income taxes	$ 13,435	$ 32,754	$ 42,712
U.S. statutory tax rate	35.00%	35.00%	35.00%
Impact of foreign operations	(15.00%)	(4.00%)	(4.00%)
Foreign dividends, net	(40.00%)	(4.00%)	0.00%
Research tax credits	(9.00%)	(2.00%)	(3.00%)
Nontaxable subsidies	(4.00%)	(1.00%)	(2.00%)
Tax settlements and changes to unrecognized tax benefits	42.00%	(4.00%)	(1.00%)
Goodwill impairment	11.00%	0.00%	0.00%
Domestic manufacturing deduction	(4.00%)	(2.00%)	0.00%
Stock-based compensation	3.00%	1.00%	1.00%
Nondeductible executive compensation	3.00%	1.00%	1.00%
Fines and penalties	2.00%	0.00%	3.00%
Prior period adjustments	4.00%	1.00%	2.00%
Other	2.00%	1.00%	0.00%
Provision for income taxes	32.00%	22.00%	32.00%
Bad debt, inventory and warranty accruals	$ 28,400	$ 26,300
Other post-employment benefits, vacation and other reserves	26,300	28,100
Tax credit and net operating loss carryforwards	96,400	80,200
Other	35,700	23,200
Total gross deferred tax assets	186,800	157,800
Valuation allowance	(66,400)	(58,300)
Total deferred tax assets	120,400	99,500
Property and equipment	22,500	30,200
Investments and intangible assets	287,800	271,800
Total deferred tax liabilities	310,300	302,000
Net deferred tax liabilities	(189,900)	(202,500)
Unrecognized tax benefits period start	8,900	14,200	$ 16,200
Additions to tax positions related to prior years	10,400	700	1,700
Reductions to tax positions related to prior years	0	(200)	(1,500)
Additions to tax positions related to the current year	1,400	1,500	1,600
Settlements	(2,400)	(500)	(400)
Lapse of statute of limitations	(2,300)	(6,300)	(2,600)
Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation	100
Currency translation		(500)	(800)
Unrecognized tax benefits period end	16,100	8,900	14,200
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	11,500	$ 3,000	$ 3,800
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	3,500
Deferred Tax Liabilities, Undistributed Foreign Earnings	447,000
Deferred Tax Liability Not Recognized, Cumulative Amount of Temporary Difference	47,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Operating Loss Carryforward, Valuation Allowance	29,600
Operating Loss Carryforward With No Expiration Date	140,800
Operating Loss Carryforwards	$ 141,300
Domestic Tax Authority [Member]
Income Taxes [Line Items]
Other	2.00%	0.00%	0.00%
Operating Loss Carryforwards	$ 1,900
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Operating Loss Carryforwards	53,000
Including accrued interest and penalties [Member]
Income Taxes [Line Items]
Unrecognized tax benefits period end	27,600
Foreign Tax Credit Carryforward [Member] | Domestic Tax Authority [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	27,600
Research Tax Credit Carryforward [Member] | Domestic Tax Authority [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	3,600
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Research	25,900
Limitations On Use | Domestic Tax Authority [Member]
Income Taxes [Line Items]
Tax Credit Carryforward, Amount	400
QuantaLife [Member] | Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Deferred Tax Assets, Tax Credit Carryforwards, Research	2,000
Net of prepaid taxes [Member]
Income Taxes [Line Items]
Unrecognized tax benefits period end	$ 14,900