Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.1
Fair Value Measurements. (Details) - Schedule of recurring and nonrecurring fair value measurements - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Assets:    
Assets $ 79,408 $ 93,032
Liabilities:    
Liabilities (4,741)
Derivative Financial Instrument [Member]    
Assets:    
Assets 22,355 $ 17,149
Benefit Plan Percentage Allocation  
Liabilities:    
Liabilities (4,741)  
Long-lived assets held-for-sale [Member]    
Assets:    
Assets 57,053 $ 58,295
Benefit Plan Percentage Allocation  
Defined Benefit Plan Assets [Member]    
Assets:    
Assets [1]  
Benefit Plan Percentage Allocation [1]  
Large U,S Equity [Member]    
Assets:    
Assets [2]   $ 5,470
Benefit Plan Percentage Allocation [2]   31.00%
Small/Mid U.S Equity [Member]    
Assets:    
Assets [3]   $ 2,605
Benefit Plan Percentage Allocation [3]   15.00%
International Equity [Member]    
Assets:    
Assets [4]   $ 2,921
Benefit Plan Percentage Allocation [4]   17.00%
Fixed Income [Member]    
Assets:    
Assets [5]   $ 6,592
Benefit Plan Percentage Allocation [5]   37.00%
Level 1 [Member]    
Assets:    
Assets 22,355 $ 17,149
Liabilities:    
Liabilities (4,741)
Level 1 [Member] | Derivative Financial Instrument [Member]    
Assets:    
Assets 22,355 17,149
Liabilities:    
Liabilities (4,741)  
Level 1 [Member] | Long-lived assets held-for-sale [Member]    
Assets:    
Assets
Level 1 [Member] | Defined Benefit Plan Assets [Member]    
Assets:    
Assets [1]  
Level 1 [Member] | Large U,S Equity [Member]    
Assets:    
Assets [2]  
Level 1 [Member] | Small/Mid U.S Equity [Member]    
Assets:    
Assets [3]  
Level 1 [Member] | International Equity [Member]    
Assets:    
Assets [4]  
Level 1 [Member] | Fixed Income [Member]    
Assets:    
Assets [5]  
Level 2 [Member]    
Assets:    
Assets 17,588
Liabilities:    
Liabilities
Level 2 [Member] | Derivative Financial Instrument [Member]    
Assets:    
Assets
Liabilities:    
Liabilities  
Level 2 [Member] | Long-lived assets held-for-sale [Member]    
Assets:    
Assets
Level 2 [Member] | Defined Benefit Plan Assets [Member]    
Assets:    
Assets [1]  
Level 2 [Member] | Large U,S Equity [Member]    
Assets:    
Assets [2]   5,470
Level 2 [Member] | Small/Mid U.S Equity [Member]    
Assets:    
Assets [3]   2,605
Level 2 [Member] | International Equity [Member]    
Assets:    
Assets [4]   2,921
Level 2 [Member] | Fixed Income [Member]    
Assets:    
Assets [5]   6,592
Level 3 [Member]    
Assets:    
Assets 57,053 58,295
Liabilities:    
Liabilities  
Level 3 [Member] | Derivative Financial Instrument [Member]    
Assets:    
Assets
Level 3 [Member] | Long-lived assets held-for-sale [Member]    
Assets:    
Assets $ 57,053 58,295
Level 3 [Member] | Defined Benefit Plan Assets [Member]    
Assets:    
Assets [1]  
Level 3 [Member] | Large U,S Equity [Member]    
Assets:    
Assets [2]  
Level 3 [Member] | Small/Mid U.S Equity [Member]    
Assets:    
Assets [3]  
Level 3 [Member] | International Equity [Member]    
Assets:    
Assets [4]  
Level 3 [Member] | Fixed Income [Member]    
Assets:    
Assets [5]  
[1] Included in other assets in the consolidated balance sheets.
[2] 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.
[3] 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.
[4] 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.
[5] 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.