Commitments and Contingencies - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			6 Months Ended	12 Months Ended	75 Months Ended		6 Months Ended	90 Months Ended	78 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 U.S. Mills [Member]	Dec. 31, 2008 U.S. Mills [Member]	Mar. 31, 2013 U.S. Mills [Member] Insurance_Carriers	Dec. 31, 2012 U.S. Mills [Member]	Jun. 30, 2013 U.S. Mills [Member] Hotspot [Member]	Jun. 30, 2013 U.S. Mills [Member] Hotspot [Member]	Jun. 30, 2013 U.S. Mills [Member] Operating Units 2 - 5 [Member]	Jun. 30, 2013 Tegrant Holding Corporation [Member]	Dec. 31, 2012 Tegrant Holding Corporation [Member]	Nov. 08, 2011 Tegrant Holding Corporation [Member]
Site Contingency [Line Items]
Portion of Hotspot remediation to be funded by U.S. Mills							50.00%
Environmental remediation expenses								$ 17,650	$ 60,825
Environmental remediation spent								14,467	11,464
Environmental accrual	73,735	75,605	52,544			53,972	3,183	3,183	49,361	18,594	18,733	18,850
Environmental contingencies future related cost, high estimate			92,000
Number of remaining insurance carriers in liquidation					2
Recognized environmental loss contingencies settlements from insurance policies				$ 40,825