Shareholders' Equity - Secondary Offering (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Stock issuance expenses		$ 15,922	$ 0
Secondary Offering
Class of Stock [Line Items]
Common shares issued by shareholder	43.5
Pricer per share of shares issued by shareholders (in USD per share)	$ 21.75	$ 21.75
Stock issuance expenses	$ 200

The cash outflow for cost incurred directly with the issuance of an equity security.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

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