Derivative Instruments - Effect of Interest Rate Swaps on Consolidated Statements of Comprehensive Income Loss (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Effect of Derivatives on Statement of Operations and Comprehensive Income:
Realized gains (losses) on interest rate swaps	[1],[2]	$ (147,475)	$ (158,239)
Realized gain (losses) on termination of interest rate swaps			(226,462)
Unrealized gains (losses) on interest rate swaps		$ (1,031,720)	$ (466,202)

[1] Consists of interest expense on interest rate swaps.

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