Related Party Transactions and Arrangements (General and Administrative Expenses) (Detail) (Affiliates Of Former Manager [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Advisory Fees and Reimbursements [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 437	$ 1,066	$ 1,955	$ 3,667
Equity Awards [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	0	3,068	14,074	5,676
General and Administrative Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 437	$ 4,134	$ 16,029	$ 9,343