Equity Textuals (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Jun. 24, 2014	Sep. 18, 2013
Statement of Stockholders' Equity [Abstract]
Common Stock, Shares, Issued	38,167,861	32,774,420	2,500,000	2,213,750
CommonStockIssuedOverAllotment			375,000	288,750
Shares Issued, Price Per Share			$ 28.00	$ 26.00
CommonStock, Value, Issued From Public Offering			$ 76.2	$ 53.9
Amount of Common Stock sold in public stock offering			$ 80.5	$ 57.6

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 30
-Article 5

Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant