Subsequent Events (Details) - Subsequent event - Credit Facility [Domain]	1 Months Ended
Jul. 31, 2015 $ / shares
Common stock
Subsequent events
Common stock, dividends declared (in dollars per share)	$ 0.19
Class F Cumulative Redeemable Preferred Stock
Subsequent events
Preferred stock, dividends declared (in dollars per share)	$ 0.138021

Aggregate dividends declared during the period for each share of common stock outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration