Debt - Debt and Financing Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Line of credit, current	$ 277,844	$ 12,296
Long-term debt and finance leases, excluding line of credit, current	15,477	10,265
Long-term debt and finance leases, current	293,321	22,561
Long-term debt and finance leases, non-current	303,093	310,378
Less, Unamortized debt issuance costs	1,173	1,230
Long-term debt and finance leases	301,920	309,148
Additional Credit Capacity	418,394
Less, amounts used to secure letters of credit and other unavailable funds	71,690
Remaining available credit capacity	346,704
Term loan A
Debt Instrument [Line Items]
Long-term debt and finance leases, excluding line of credit, current	10,000	10,000
Long-term debt and finance leases, non-current	$ 185,000	$ 187,500
Weighted Average Interest Rate	2.615%	3.30%
Unsecured notes
Debt Instrument [Line Items]
Long-term debt and finance leases, non-current	$ 116,880	$ 116,880
Weighted Average Interest Rate	7.625%	7.625%
Finance leases and other
Debt Instrument [Line Items]
Long-term debt and finance leases, excluding line of credit, current	$ 5,477	$ 265
Long-term debt and finance leases, non-current	$ 1,213	$ 5,998
Weighted Average Interest Rate	5.431%	2.613%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit, current	$ 250,000
Weighted Average Interest Rate	3.083%
Additional Credit Capacity	$ 250,000
AR securitization
Debt Instrument [Line Items]
Line of credit, current	$ 20,000
Weighted Average Interest Rate	1.918%
Additional Credit Capacity	$ 130,000
Asian Credit Lines
Debt Instrument [Line Items]
Line of credit, current	$ 7,844	$ 12,296
Weighted Average Interest Rate	4.656%	4.701%
Additional Credit Capacity	$ 38,394

Long term debt current excluding notes payable current.

No definition available.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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- Definition

Amount of assets pledged to secure a debt instrument.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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- Definition

Amount of long-term debt and lease obligation, classified as noncurrent.

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Amount of long-term debt and lease obligation, classified as current.

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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