Related Party Transactions and Arrangements (Management Fees to Affiliates) (Detail) (Affiliates Of Former Manager [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Management Fees To Affiliates, Asset Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 13,888	$ 11,693
Management Fees To Affiliates, Property Management Fees [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	800
Management Fees To Affiliates [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 13,888	$ 12,493