Note 14 - Asset Retirement Obligation

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Asset Retirement Obligation Disclosure [Text Block]

NOTE 14 — ASSET RETIREMENT OBLIGATION

The following table presents a reconciliation of the beginning and ending aggregate carrying amount of asset retirement obligation for the years presented below:

	Year Ended December 31,
	2019			2018
	(Dollars in thousands)
Balance at beginning of year	$	39,475		$	27,110
Revision in estimated cash flows		(335	)		(258	)
Liabilities incurred and acquired		8,334			10,149
Accretion expense		2,709			2,474
Balance at end of year	$	50,183		$	39,475