Derivative Instruments - Effect of Interest Rate Swaps on Consolidated Statements of Comprehensive Income Loss (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Effect of Derivatives on Statement of Operations and Comprehensive Income:
Realized gains (losses) on interest rate swaps	[1],[2]	$ (130,762)	$ (144,465)	$ (278,237)	$ (302,704)
Realized gain (losses) on termination of interest rate swaps		(60,064)		(60,064)	(226,462)
Unrealized gains (losses) on interest rate swaps		$ (373,220)	$ 700,792	$ (1,404,940)	$ 234,590

[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).