Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2014

Asset Retirement Obligation [Abstract]

Schedule of Asset Retirement Obligations [Table Text Block]

Changes in the carrying amounts of the Company’s AROs at December 31, 2014 are shown below:

(In thousands)
Balance at December 31, 2013	$	2,167
Liabilities assumed in ATMI acquisition	7,365
Liabilities settled	(128		)
Liabilities incurred	248
Accretion expense	195
Revision of estimate	103
Balance at December 31, 2014	$	9,950