Impairment Losses (Narrative) (Details) - 3 months ended Jun. 30, 2015 $ in Millions	USD ($) property
Long Lived Assets Held-for-sale [Line Items]
Percentage of shortfall on cash flow or operating performance to determine significant underperformance	15.00%
Assumed holding period for core assets	10 years
Number of hotels held for use with impairment recovery | property	1
Asset Impairment Recovery on hotels held for use	$ 0.1
Minimum [Member]
Long Lived Assets Held-for-sale [Line Items]
Assumption used to determine impairment loss for non-core assets, holding period	3 years
Maximum [Member]
Long Lived Assets Held-for-sale [Line Items]
Assumption used to determine impairment loss for non-core assets, holding period	5 years