Related Party Transactions and Arrangements (General and Administrative Expenses) (Details) - Affiliates of Former Manager [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Related Party Transaction [Line Items]
Related party expenses	$ 0	$ 437	$ 0	$ 16,029
Advisory Fees And Reimbursements [Member]
Related Party Transaction [Line Items]
Related party expenses	0	437	0	1,955
Equity Awards [Member]
Related Party Transaction [Line Items]
Related party expenses	$ 0	$ 0	$ 0	$ 14,074

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Name:	us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration