Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 223,627us-gaap_RevenueFromLeasedAndOwnedHotels	$ 229,217us-gaap_RevenueFromLeasedAndOwnedHotels	$ 229,934us-gaap_RevenueFromLeasedAndOwnedHotels	$ 190,084us-gaap_RevenueFromLeasedAndOwnedHotels	$ 201,467us-gaap_RevenueFromLeasedAndOwnedHotels	$ 204,345us-gaap_RevenueFromLeasedAndOwnedHotels	$ 218,013us-gaap_RevenueFromLeasedAndOwnedHotels	$ 175,863us-gaap_RevenueFromLeasedAndOwnedHotels	$ 872,862us-gaap_RevenueFromLeasedAndOwnedHotels	$ 799,688us-gaap_RevenueFromLeasedAndOwnedHotels	$ 726,887us-gaap_RevenueFromLeasedAndOwnedHotels
Net Assets	2,763,990us-gaap_AssetsNet				2,563,841us-gaap_AssetsNet				2,763,990us-gaap_AssetsNet	2,563,841us-gaap_AssetsNet	2,609,026us-gaap_AssetsNet
Chicago [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									132,690	149,498	144,260
Net Assets	436,490				462,938				436,490	462,938	475,900
Los Angeles [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									64,923	58,608	56,727
Net Assets	0				99,258				0	99,258	154,556
Boston [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									116,861	102,482	84,512
Net Assets	397,807				399,162				397,807	399,162	404,800
US Virgin Islands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									65,586	62,439	55,753
Net Assets	118,458				120,222				118,458	120,222	117,506
New York City [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									134,841	95,798	112,279
Net Assets	660,609				516,555				660,609	516,555	488,154
Minneapolis [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									49,704	50,097	49,075
Net Assets	131,080				136,255				131,080	136,255	133,805
Denver [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									34,206	31,909	29,469
Net Assets	113,670				115,447				113,670	115,447	116,834
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									274,051	248,857	194,812
Net Assets	$ 905,876				$ 714,004				$ 905,876	$ 714,004	$ 717,471