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Credit Agreement - Schedule of Credit Agreement (Detail) - Credit Agreement [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Credit Agreement:    
Credit facility remaining availability $ 124,113 $ 124,082
Outstanding letters of credit 887 918
Availability of additional letters of credit [1] $ 124,113 $ 124,082
Line of credit facility, interest rate 0.00% 0.00%
Commitment fee rate 0.30% 0.30%
Letter of credit fee rate [2] 6.50% 3.00%
[1] The letters of credit availability under the credit agreement with Wintrust is up to the borrowing limit of $125.0 million.
[2] The letter of credit fee rate is based on prime minus 1.0%, subject to a minimum rate of 3.0%. The prime rate as of December 31, 2022 was 7.50%, which would yield a 6.50% fee rate, which is reflected in the table above.