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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 |  |

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