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v3.10.0.1

Long-term Debt (Details) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Line of Credit Facility [Line Items] |  |
Current borrowing capacity | $ 350,000 |
Maximum borrowing capacity | $ 400,000 |
Percentage Of Subsidiary Stock Securing Debt | 0.65 |
Long-term debt | $ 104,400 | $ 104,400
Letters of Credit Outstanding, Amount | 1,000 |
Line of Credit Facility, Remaining Borrowing Capacity | $ 244,600 |
Applicable Margin Federal Funds Rate | 0.50% |
Applicable Margin 30 Day Libor | 2.00% |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.25% |
Line of Credit Facility, Interest Rate During Period | 3.76% |
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 1.50% |
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 2.25% |
Base Rate [Member] | Minimum [Member] |  |
Line of Credit Facility [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 0.00% |
Base Rate [Member] | Maximum [Member] |  |
Line of Credit Facility [Line Items] |  |
Debt Instrument, Basis Spread on Variable Rate | 0.50% |

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- Definition Applicable margin to the federal funds rate for alternate base rate borrowings. + References No definition available. + Details
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- Definition Percentage of subsidiary stock securing debt per debt agreements. + References No definition available. + Details
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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