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Supplemental Disclosure of Cash Flow Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2015
Supplemental Cash Flow Information [Abstract]        
Cash paid for interest and financing costs $ 30,935 $ 23,870 $ 18,858  
Cash paid for taxes 2,555 378 3,543  
Proceeds from Income Tax Refunds $ 7,012 $ 0 $ 0 $ 1,900