Contingencies - Components of Recorded Liability Related to Claims and Contingencies (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Schedule of Claims and Contingencies [Line Items]
Total	$ 126,074	$ 129,515	$ 125,880	$ 38,952	$ 38,648	$ 126,978
Other current liabilities	32,169		25,893	37,011
Other liabilities	93,905		99,987	1,941
Total	126,074	129,515	125,880	38,952	38,648	126,978
2009 RSA [Member]
Schedule of Claims and Contingencies [Line Items]
Total	113,477		116,923	31,982
Total	113,477		116,923	31,982
Other claims and contingencies [Member]
Schedule of Claims and Contingencies [Line Items]
Total	12,597		8,957	6,970
Total	$ 12,597		$ 8,957	$ 6,970