Acquisition of Hotel Properties (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business acquisition, unaudited proforma information
Total revenues	$ 216,321	$ 207,495	$ 608,741	$ 582,497
Operating income (loss)	47,763	42,488	112,763	98,162
Net income (loss) attributable to common shareholders	$ 31,631	$ 29,359	$ 63,584	$ 60,213
Net income (loss) per share attributable to common shareholders - basic (usd per share)	$ 0.44	$ 0.41	$ 0.88	$ 0.83
Net income (loss) per share available to common shareholders — diluted (usd per share)	$ 0.43	$ 0.40	$ 0.87	$ 0.83

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 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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