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Taxes - Additional Information (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jul. 06, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Tax Credit Carryforward [Line Items] |  |  |  |
Domestic income from continuing operations before taxes |  | $ 11,637,000 | $ 25,585,000 | $ 20,146,000
Foreign income from continuing operations before taxes |  | 115,325,000 | 106,171,000 | 58,310,000
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount |  | 1,105,000 | 652,000 | 267,000
Increase (decrease) in tax expense upon the expiration of the statutes of limitation for certain reserves for income tax uncertainties |  | (975,000) | (217,000) | (1,790,000)
Increase (decrease) in tax expense for research tax credits |  | (910,000) | (645,000) | (428,000)
Income Tax Examination, Increase (Decrease) in Liability from Prior Year |  | 65,000 | (418,000) |
Increase (decrease) in interest and penalties |  | (148,000) | (46,000) | (854,000)
Unrecognized tax benefit shown as a reduction to noncurrent deferred tax assets |  | 1,028,000 | 1,028,000 |
Reserve for income taxes |  | 4,830,000 | 4,623,000 |
Deferred Tax Liabilities, Gross, Noncurrent |  | 5,858,000 | 5,651,000 |
Interest and penalties, gross |  | 562,000 | 524,000 |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate |  | 701,000 | 664,000 |
Minimum decrease in income tax expense due to release in reserves |  | 750,000 |  |
Maximum decrease in income tax expense due to release in reserves |  | 850,000 |  |
Non deductible federal and state liabilities |  | 1,198,000 | 2,430,000 |
Income from expiration of the statute of limitations relating to a tax |  |  | 354,000 |
Income tax paid net |  | $ 58,280,000 | $ 17,549,000 | 8,831,000
Open Tax Year State Authorities |  | 2011 through 2014 |  |
Open tax year United States Internal Revenue Service |  | 2012 through 2014 |  |
Tax years open to examination, various authorities |  | 2011 through 2014 |  |
Tax years covered through Advanced Pricing Agreement |  |  | 2006 through 2011 |
Tax years for APA agreement |  | Between 2014 and 2018 |  |
State research and experimentation tax carryforwards |  | 2014 through 2016 |  |
Research Tax Credit Carryforward [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Deferred Tax Assets, Valuation Allowance |  | $ 776,000 |  |
State Research And Experimentation [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Research |  | 6,119,000 |  |
SISD [Member] | Discontinued Operations, Disposed of by Sale [Member] |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |
Gain on sale of discontinued business | $ 125,357,000 | 125,357,000 | $ 0 | 0
Income tax expense on discontinued operations | $ 47,175,000 | $ 47,801,000 | $ 4,997,000 | $ 3,040,000

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