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WISCONSIN ECONOMIC DEVELOPMENT TAX CREDIT (Details) - Wisconsin Economic Development Tax Credit Agreement $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2015 USD ($) item
Agreements |  |  |
Refundable tax credits available, contingent on the Company expending $26.3 million in capital investments and establishing 758 full-time positions |  |  | $ 9.0
Capital investment expenditures over specified period, requirement to earn the refundable tax credits |  |  | $ 26.3
Full-time positions that must be created over a specified time period to earn the refundable tax credits | item |  |  | 758
Period over which the capital investment expenditures must be incurred and the creation of full-time positions must be completed |  |  | 7 years
Refundable tax credits earned | $ 7.8 |  |
Refundable tax credit received | 2.4 |  |
Refundable tax credit receivable | 5.4 |  |
Amortization of tax credits | 0.4 | $ 0.3 |
Prepaid expenses and other current assets |  |  |
Agreements |  |  |
Refundable tax credit receivable | 1.9 |  |
Other long-term assets |  |  |
Agreements |  |  |
Refundable tax credit receivable | 3.5 |  |
Short-term other liabilities |  |  |
Agreements |  |  |
Refundable tax credit, offsetting liability | 1.9 |  |
Other long-term liabilities |  |  |
Agreements |  |  |
Refundable tax credit, offsetting liability | $ 3.2 |  |

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- Definition The amount of expenditures in capital investments the Company is required to make over a specified period to earn the refundable tax credits. + References No definition available. + Details
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- Definition Represents the refundable tax credits available, that is contingent on the Company expending a specified dollar amount on capital investments and the creation of a specified number of full-time positions. + References No definition available. + Details
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