Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2016

Asset Retirement Obligation Disclosure [Abstract]

Changes in Asset Retirement Obligation Liabilities

The components of the changes in the asset retirement obligation liabilities were:

	Short-Term Portion			Long-Term Portion			Total
	(Dollars in thousands)
Balance at January 1, 2016	$	296		$	7,543		$	7,839
Accretion	9			146			155
Amounts Paid	(59		)	—			(59		)
Asset additions and (reductions) recorded	—			14			14
Reclassifications	38			(38		)	—
Balance at March 31, 2016	$	284		$	7,665		$	7,949