Derivative Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Interest rate swap agreements | Other Current Liabilities
Derivative [Line Items]
Interest rate swap agreements	$ 12,069
Interest rate swap agreements | Other long-term liabilities
Derivative [Line Items]
Interest rate swap agreements		18,994
Interest rate swap agreements | Other long-term assets
Derivative [Line Items]
Interest rate derivative agreements	10,004
Interest rate cap agreements | Other long-term assets
Derivative [Line Items]
Interest rate derivative agreements	$ 7,567	$ 65