Chapter 11 Reorganization (Schedule Of Chapter 11 Reorganization Balance Sheet II) (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Allowance for doubtful accounts		$ 24,629	$ 12,156
Accounts receivable, net of allowance for doubtful accounts of $24,629 and $12,156 at December 31, 2020 and 2019, respectively		183,964	332,047
Notes receivable		72,612	68,092
Accounts payable		55,873	$ 92,966
Reorganization, Chapter 11, Plan Effect Adjustment [Member]
Allowance for doubtful accounts		19,036
Accounts receivable, net of allowance for doubtful accounts of $24,629 and $12,156 at December 31, 2020 and 2019, respectively	[1]	239,962
Notes receivable	[2]	73,027
Accounts payable	[3]	2,348,756
Reorganization, Chapter 11, Plan Effect Adjustment [Member] | Intra-group [Member]
Accounts receivable, net of allowance for doubtful accounts of $24,629 and $12,156 at December 31, 2020 and 2019, respectively		111,400
Notes receivable		400
Accounts payable		$ 2,315,800

[1] Includes intra-group receivables in the amount of $111.4 million.

[2] Includes intra-group note receivables in the amount of $0.4 million.

[3] Includes intra-group payables in the amount of $2,315.8 million.