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Schedule of Related Party Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Principal amount	$ 101,700
Net carrying amount	72,036	$ 72,089
Related Party Debt
Related Party Transaction [Line Items]
Principal amount	71,506	71,506
Unamortized premium	581	639
Unaccreted debt issuance costs	(51)	(56)
Net carrying amount	$ 72,036	$ 72,089

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
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- Definition

Amount, after accumulated amortization, of debt premium.

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The amount for notes payable (written promise to pay), payable to related parties, which are due after one year (or one business cycle).

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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.

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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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