Business Combinations and Acquisition and Disposition of Hotel Properties - Merger with LaSalle Hotel Properties - Narrative (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Nov. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Common shares of beneficial interest, par value (usd per share) | $ / shares		$ 0.01	$ 0.01
Depreciation expense		$ 234,880	$ 108,475	$ 102,290
Transaction costs		600	72,700
Integration costs		7,700	2,000
LaSalle Hotel Properties
Business Acquisition [Line Items]
Common exchange ratio, right to receive shares for each share of common stock	0.92
Right to receive cash in lieu of common shares (in usd per share) | $ / shares	$ 37.80
Maximum percentage of shares available to convert to cash	30.00%
Total consideration	$ 4,102,094
Decrease to fair value of investment in hotel properties		24,600
Decrease to intangible assets		12,700
Increase to prepaid expenses and other assets		7,000
Decrease to accounts payable and accrued expenses		$ 30,300
Revenues of acquired hotel properties since acquisition date			56,700
Operating income of acquired hotel properties since acquisition date			$ 15,900
LaSalle Hotel Properties
Business Acquisition [Line Items]
Common shares of beneficial interest, par value (usd per share) | $ / shares	$ 0.01
Series I preferred stock | LaSalle Hotel Properties
Business Acquisition [Line Items]
Preferred stock, dividend rate, percentage	6.375%
Series E Cumulative Redeemable Preferred Shares
Business Acquisition [Line Items]
Preferred stock, dividend rate, percentage	6.375%	6.375%
Series E Cumulative Redeemable Preferred Shares | LaSalle Hotel Properties
Business Acquisition [Line Items]
Preferred exchange ratio, right to receive shares for each share of common stock	1
Series J preferred stock | LaSalle Hotel Properties
Business Acquisition [Line Items]
Preferred stock, dividend rate, percentage	6.30%
Series F preferred shares
Business Acquisition [Line Items]
Preferred stock, dividend rate, percentage	6.30%	6.30%
Series F preferred shares | LaSalle Hotel Properties
Business Acquisition [Line Items]
Preferred exchange ratio, right to receive shares for each share of common stock	1
Common Shares | LaSalle Hotel Properties
Business Acquisition [Line Items]
Equity interests issued (in shares) | shares	61,400,000
Equity interests issued (in usd per share) | $ / shares	$ 34.92
Preferred shares | Series E Cumulative Redeemable Preferred Shares | LaSalle Hotel Properties
Business Acquisition [Line Items]
Equity interests issued (in shares) | shares	4,400,000
Equity interests issued (in usd per share) | $ / shares	$ 23.10
Preferred shares | Series F preferred shares | LaSalle Hotel Properties
Business Acquisition [Line Items]
Equity interests issued (in shares) | shares	6,000,000
Equity interests issued (in usd per share) | $ / shares	$ 22.10
Operating partnership units | LaSalle Hotel Properties
Business Acquisition [Line Items]
Equity interests issued (in shares) | shares	133,605
Equity interests issued (in usd per share) | $ / shares	$ 34.92
LaSalle Hotel Properties
Business Acquisition [Line Items]
Common shares held prior to acquisition (in shares) | shares	10,800,000
Value of common shares held prior to acquisition	$ 346,500