Income Taxes - Schedule of Per Share Distributions to Stockholders (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Common share distribution	$ 0.800000	$ 0.800000	$ 0.800000
Ordinary income	$ 0.599384	$ 0.601216	$ 0.300844
Capital gains	$ 0.046380	$ 0.117584	$ 0.031396
Unrecaptured Sec. 1250 gain	$ 0.026512	$ 0.086976	$ 0.031396
Return of capital	$ 0.154236	$ 0.081200	$ 0.467760
Allocable to next year