Commitments and Contingencies (Tables)

9 Months Ended

Sep. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Activity in Environmental

Activity in the environmental liability is as follows:

(in thousands)	Balance at Beginning of the Period		Additions to Accrual		Expenditures for Remediation		Balance at 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
Quarter ended September 30, 2015	$	21,079	$	—	$	1,007	$	20,072