Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical)

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]      
Unrealized loss due to fair value adjustments on interest rate swap agreements, taxes $ 3,532 $ 2,692 $ 1,243