Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2014

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, 2014	$	358		$	7,599		$	7,957
Accretion	7			180			187
Additions	—			70			70
Reclassifications	146			(146		)	—
Amounts paid	(68		)	—			(68		)
Balance at March 31, 2014	$	443		$	7,703		$	8,146