Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements. (Details) - Schedule of recurring and nonrecurring fair value measurements

v3.20.2
Fair Value Measurements. (Details) - Schedule of recurring and nonrecurring fair value measurements - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 03, 2020
Dec. 02, 2020
Dec. 01, 2020
Liabilities:        
Liabilities $ (2,837)      
Long-lived assets held-for-sale [Member]        
Assets 70,400      
Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets [1] $ 4,654      
Liabilities:        
Benefit plan allocation percentage 30.00%      
Defined Benefit Plan Assets Small/Mid U.S. Equity [Member]        
Assets [2] $ 2,348      
Liabilities:        
Benefit plan allocation percentage 15.00%      
Defined Benefit Plan Assets International Equity [Member]        
Assets [3] $ 2,596      
Liabilities:        
Benefit plan allocation percentage 17.00%      
Defined Benefit Plan Assets Fixed Income [Member]        
Assets [4] $ 6,056      
Liabilities:        
Benefit plan allocation percentage 38.00%      
Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets $ 88,492      
Derivative Financial Instruments, Liabilities [Member]        
Liabilities:        
Liabilities (1,860)      
Fair Value, Inputs, Level 1 [Member]        
Liabilities:        
Liabilities       $ (1,860)
Fair Value, Inputs, Level 1 [Member] | Long-lived assets held-for-sale [Member]        
Assets      
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets [1]      
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan Assets Small/Mid U.S. Equity [Member]        
Assets [2]      
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan Assets International Equity [Member]        
Assets [3]      
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan Assets Fixed Income [Member]        
Assets [4]      
Fair Value, Inputs, Level 1 [Member] | Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets       2,438
Fair Value, Inputs, Level 1 [Member] | Derivative Financial Instruments, Liabilities [Member]        
Liabilities:        
Liabilities       (1,860)
Fair Value, Inputs, Level 2 [Member]        
Liabilities:        
Liabilities      
Fair Value, Inputs, Level 2 [Member] | Long-lived assets held-for-sale [Member]        
Assets      
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets [1]     4,654  
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan Assets Small/Mid U.S. Equity [Member]        
Assets [2]     2,348  
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan Assets International Equity [Member]        
Assets [3]     2,596  
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan Assets Fixed Income [Member]        
Assets [4]     6,056  
Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets     15,654  
Fair Value, Inputs, Level 2 [Member] | Derivative Financial Instruments, Liabilities [Member]        
Liabilities:        
Liabilities      
Fair Value, Inputs, Level 3 [Member]        
Liabilities:        
Liabilities   $ (977)    
Fair Value, Inputs, Level 3 [Member] | Long-lived assets held-for-sale [Member]        
Assets   70,400    
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets [1]      
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan Assets Small/Mid U.S. Equity [Member]        
Assets [2]      
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan Assets International Equity [Member]        
Assets [3]      
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan Assets Fixed Income [Member]        
Assets [4]      
Fair Value, Inputs, Level 3 [Member] | Defined Benefit Plan Assets Large U.S. Equity [Member]        
Assets   70,400    
Fair Value, Inputs, Level 3 [Member] | Derivative Financial Instruments, Liabilities [Member]        
Liabilities:        
Liabilities      
Warrant [Member]        
Liabilities:        
Liabilities (977)      
Warrant [Member] | Fair Value, Inputs, Level 1 [Member]        
Liabilities:        
Liabilities      
Warrant [Member] | Fair Value, Inputs, Level 2 [Member]        
Liabilities:        
Liabilities      
Warrant [Member] | Fair Value, Inputs, Level 3 [Member]        
Liabilities:        
Liabilities   (977)    
Derivative Financial Instruments, Assets [Member]        
Assets 5,792      
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 1 [Member]        
Assets       5,792
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 2 [Member]        
Assets      
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 3 [Member]        
Assets      
Derivative Financial Instruments, Assets [Member]        
Assets $ 2,438      
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 1 [Member]        
Assets       $ 2,438
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 2 [Member]        
Assets      
Derivative Financial Instruments, Assets [Member] | Fair Value, Inputs, Level 3 [Member]        
Assets      
[1] This category includes investments in funds comprised of equity securities of large U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[2] This category includes investments in funds comprised of equity securities of small- and medium-sized U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[3] This category includes investments in funds comprised of equity securities of foreign companies including emerging markets. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[4] This category includes investments in funds comprised of U.S. and foreign investment-grade fixed income securities, high-yield fixed income securities that are rated below investment-grade, U.S. treasury securities, mortgage-backed securities, and other asset-backed securities. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.