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v3.19.1

1. Significant Accounting Policies Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Property, Plant and Equipment [Line Items] |  |  |  |
Restricted investments | $ 5,560 | $ 5,560 |  |
Retained earnings | 3,722,073 | 1,830,439 |  |
Other assets | 70,298 | 94,949 |  |
Prepaid Taxes | 5,500 |  |  | $ 22,800
Equipment | 970,081 | 971,140 |  |
Deferred income taxes | 553,239 | 222,209 |  |
Income Tax Expense (Benefit) | $ (147,045) | $ 24,444 | $ (15,560) |
Minimum [Member] | Software [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |  |
Minimum [Member] | Building and Building Improvements [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 15 years |  |  |
Minimum [Member] | Reagent Rental Equipment [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 1 year |  |  |
Minimum [Member] | Equipment [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 3 years |  |  |
Maximum [Member] | Software [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 12 years |  |  |
Maximum [Member] | Building and Building Improvements [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 39 years |  |  |
Maximum [Member] | Reagent Rental Equipment [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 5 years |  |  |
Maximum [Member] | Equipment [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Property, Plant and Equipment, Useful Life | 12 years |  |  |
Adjustments for New Accounting Pronouncement [Member] |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Retained earnings |  |  |  | $ 1,543,700

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