Derivative Instruments - Effect of Interest Rate Swaps on Consolidated Statements of Comprehensive Income Loss (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Effect of Derivatives on Statement of Operations and Comprehensive Income:
Realized gains (losses) on interest rate swaps	$ (908,294)	[1]	$ (893,769)	[1]	$ (882,395)	[1]
Realized gain (losses) on termination of interest rate swaps	(101,862)		(2,385)
Unrealized gains (losses) on interest rate swaps	$ 2,002,200		$ (32,219)		$ (1,815,107)

[1] Interest expense related to the Company's interest rate swaps is recorded in Realized losses on interest rate swaps on the Consolidated Statements of Operations and Comprehensive Income (Loss).