Post-effective amendment to a registration statement that is not immediately effective upon filing

FINANCING ARRANGEMENTS - Revolving credit facility (Details)

v3.21.1
FINANCING ARRANGEMENTS - Revolving credit facility (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Mar. 12, 2021
Jul. 20, 2018
Letters of credit          
Financing arrangements          
Maximum borrowing capacity $ 10,000,000        
Revolving credit agreement          
Financing arrangements          
Debt instrument, face 110,000,000        
Outstanding borrowings $ 0 $ 0      
Available borrowing capacity   $ 94,300,000      
Interest rate 5.75% 7.25%      
Aggregate amount committed $ 83,700,000     $ 150,000,000 $ 110,000,000
Interest expense $ 479,000 $ 1,389,000 $ 703,000    
Revolving credit agreement | LIBOR          
Financing arrangements          
Spread on variable rate 3.50%