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Summary of Significant Accounting Policies - Noncontrolling Interests (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Nov. 30, 2019
Aug. 31, 2019
May 31, 2019
Nov. 30, 2018
Aug. 31, 2018
May 31, 2018
Nov. 30, 2019
Nov. 30, 2018
Noncontrolling Interest [Line Items]                
Beginning balance     $ 28,153     $ 30,680 $ 28,153 $ 30,680
Net Income (Loss) Attributable to Noncontrolling Interest $ (121)     $ 837     1,557 2,396
Distributions to noncontrolling interests (272) $ (824) (1,121) (1,068) $ (1,003) (1,721) (2,217) (3,792)
Sale of controlling interest in subsidiary             (47,976)  
Ending balance (20,483)     29,284     (20,483) 29,284
Austin Radio Partnership                
Noncontrolling Interest [Line Items]                
Beginning balance     47,146     47,424 47,146 47,424
Net Income (Loss) Attributable to Noncontrolling Interest             3,047 4,132
Distributions to noncontrolling interests             (2,217) (3,792)
Sale of controlling interest in subsidiary             (47,976)  
Ending balance       47,764       47,764
Digonex [Member]                
Noncontrolling Interest [Line Items]                
Beginning balance     $ (18,993)     $ (16,744) (18,993) (16,744)
Net Income (Loss) Attributable to Noncontrolling Interest             (1,490) (1,736)
Ending balance $ (20,483)     $ (18,480)     $ (20,483) $ (18,480)