Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Activity in Environmental

Activity in the environmental liability is as follows:

	Balance at the Beginning		Additions to		Expenditures for		Balance at
(in thousands)	of the Period		Accrual		Remediation		Period-end
Year ended December 31, 2013	$	13,942	$	—	$	701	$	13,241
Year ended December 31, 2014	13,241		10,000		1,590		21,651
Quarter ended March 31, 2015	21,651		—		286		21,365
Quarter ended June 30, 2015	$	21,365	$	—	$	286	$	21,079