SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Notes)

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

Schedule II -VALUATION AND QUALIFYING ACCOUNTS

Description	Beginning Balance January 1,		Charged to Costs and Expenses		Deductions (1)		Ending Balance December 31,
	(in thousands)
2019:
Allowance for doubtful accounts	$	4,381	$	3,209	$	114	$	7,476
Allowance for expirations of unproved crude oil and natural gas properties	542,709		8,523		544,351		6,881
2018:
Allowance for doubtful accounts	3,128		1,276		23		4,381
Allowance for expirations of unproved crude oil and natural gas properties	251,159		388,068		96,518		542,709
2017:
Allowance for uncollectible notes	$	44,038	$	—	$	44,038	$	—
Allowance for doubtful accounts	2,190		1,108		170		3,128
Allowance for expirations of unproved crude oil and natural gas properties	359		263,817		13,017		251,159

(1)

For allowance for uncollectible notes, deductions represent reversals of allowances due to the collection of amounts owed. For allowance for doubtful accounts, deductions represent the write-off of accounts receivable deemed uncollectible. For allowance for expirations of unproved crude oil and natural gas properties, deductions represent actual expired or abandoned unproved crude oil and natural gas properties, with a corresponding decrease to the historical cost of the associated asset.