Related Party Transactions and Arrangements (General and Administrative Expenses) (Detail) (Affiliates Of Former Manager [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Advisor Fees And Expense Reimbursements [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 5,602	$ 826	$ 168
Equity Awards [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	97,604	0	0
General and Administrative Expense [Member]
Related Party Transaction [Line Items]
Related Party Transaction, Expenses from Transactions with Related Party	$ 103,206	$ 826	$ 168