Related Party Transactions and Arrangements (Due To Affiliates) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013		Sep. 30, 2013
Related Party Transaction [Line Items]
Due to affiliates	$ 2,757	$ 103,434	[1]	$ 6,107
Affiliated Entity [Member] | Offering Related Costs [Member]
Related Party Transaction [Line Items]
Due to affiliates	2,000	220
Affiliated Entity [Member] | Merger And Other Non-Routine Transactions [Member]
Related Party Transaction [Line Items]
Due to affiliates	0	38,645
Affiliated Entity [Member] | General and Administrative Expense [Member]
Related Party Transaction [Line Items]
Due to affiliates	63	59,600
Affiliated Entity [Member] | Indirect Affiliate Expenses [Member]
Related Party Transaction [Line Items]
Due to affiliates	413	0
Affiliated Entity [Member] | Managed REITS and Other [Member]
Related Party Transaction [Line Items]
Due to affiliates	281	0
Affiliated Entity [Member] | Management Fees To Affiliates [Member]
Related Party Transaction [Line Items]
Due to affiliates	$ 0	$ 4,969

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Consolidated Financial Statements.