v3.3.1.900

Subsequent Events (Details) - $ / shares			12 Months Ended
	Feb. 15, 2016	Nov. 04, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Subsequent Event [Line Items]
Dividends declared per common share (in dollars per share)		$ 0.14	$ 0.53	$ 0.46	$ 0.38
Subsequent event
Subsequent Event [Line Items]
Dividends declared per common share (in dollars per share)	$ 0.14
Subsequent event | Preference shares - Series A
Subsequent Event [Line Items]
Dividends declared per Preference share (in dollars per share)	0.515625
Subsequent event | Preference shares - Series B
Subsequent Event [Line Items]
Dividends declared per Preference share (in dollars per share)	0.90625
Subsequent event | Preference shares - Series C
Subsequent Event [Line Items]
Dividends declared per Preference share (in dollars per share)	$ 0.54427083

X

- Definition

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

+ References

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

+ Details

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Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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X

- Details

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X

- Details

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X

- Details

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