Acquisition of Hotel Properties (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business acquisition, unaudited proforma information
Total revenues	$ 208,893	$ 199,906	$ 392,420	$ 375,006
Operating income (loss)	43,076	38,149	65,947	56,667
Net income (loss) attributable to common shareholders	$ 26,807	$ 27,054	$ 33,480	$ 31,806
Net income (loss) per share attributable to common shareholders - basic (usd per share)	$ 0.37	$ 0.38	$ 0.46	$ 0.44
Net income (loss) per share available to common shareholders — diluted (usd per share)	$ 0.37	$ 0.37	$ 0.46	$ 0.44

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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