Related Party Transactions and Arrangements (General and Administrative Expenses) (Detail) (Affiliates Of Former Manager [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Administrative Expenses [Member]
Schedule of Other Related Party Transactions [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 60	$ 866	$ 2,015	$ 4,533
Equity Awards [Member]
Schedule of Other Related Party Transactions [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	6,138	14,074	11,814
General and Administrative Expense [Member]
Schedule of Other Related Party Transactions [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 60	$ 7,004	$ 16,089	$ 16,347