Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2015

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Reconciliation of Company's Asset Retirement Obligations

The following is a reconciliation of the Company’s asset retirement obligations for the years ended December 31, 2015, 2014 and 2013:

(in thousands)
Balance at January 1, 2013	$	5,416
Net increase due to changes in estimated future cash flows		341
Accretion expense		628
Balance at December 31, 2013		6,385
Capitalization		277
Accretion expense		773
Balance at December 31, 2014		7,435
Net decrease due to changes in estimated future cash flows		(37	)
Accretion expense		747
Balance at December 31, 2015	$	8,145