Commitments and Contingencies - Additional Information (Detail) - USD ($) |
1 Months Ended | |
|---|---|---|
Oct. 31, 2002 |
May 31, 2019 |
|
| Standby Letter of Credit | ||
| Commitments and Contingencies Disclosure [Line Items] | ||
| Standby letter of credit agreements in favor of third parties | $ 3,100,000 | |
| Amounts drawn on standby letter of credit | 0 | |
| 2002 STAR Bonds | ||
| Commitments and Contingencies Disclosure [Line Items] | ||
| Proceeds from long-term debt | $ 6,300,000 | |
| Frequency of periodic payment | annual | |
| Long-term debt | $ 500,000 |