Credit Agreement - Schedule of Credit Agreement (Detail) - Credit Agreement [Member] - USD ($) $ in Thousands |
12 Months Ended | |||||
---|---|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
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Credit Agreement: | ||||||
Credit facility remaining availability | $ 47,782 | $ 47,782 | ||||
Outstanding letters of credit | [1] | 2,218 | 2,218 | |||
Availability of additional letters of credit | [2] | $ 22,782 | $ 22,782 | |||
Weighted average annual interest rate | 0.00% | 0.00% | ||||
Commitment fee rate | 0.30% | 0.30% | ||||
Letter of credit fee rate | 1.25% | 1.25% | ||||
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