Stockholders' Equity - Summary of Dividend Distributions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Class of Stock [Line Items]
Total Common Dividend/ Distribution	$ 11,824
Total Preferred Dividend/ Distribution	1,019
Common Stock/Operating Partnership Units
Class of Stock [Line Items]
Total Common Dividend/ Distribution	11,824
Series F Preferred Stock
Class of Stock [Line Items]
Total Preferred Dividend/ Distribution	566
Series G Preferred Stock
Class of Stock [Line Items]
Total Preferred Dividend/ Distribution	$ 453