Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2015

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, 2015	$	342		$	6,805		$	7,147
Accretion	93			404			497
Additions	—			45			45
Reclassifications	20			(20		)	—
Amounts paid	(128		)	—			(128		)
Balance at September 30, 2015	$	327		$	7,234		$	7,561