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Redeemable Noncontrolling Interests in Operating Partnership (Details) - USD ($) | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 30, 2017 | Apr. 30, 2017 | Oct. 31, 2016 | Jul. 27, 2015 | May 31, 2015 | Mar. 31, 2015
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interests in operating partnership | $ 46,627,000 | $ 59,544,000 |  |  |  |  |  |  |
Redemption value adjustments | 8,843,000 | 3,691,000 | $ 17,444,000 |  |  |  |  |  |
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable | 2,038,000 | 1,899,000 | (393,000) |  |  |  |  |  |
Cash distributions declared | 2,800,000 | 2,300,000 | 2,200,000 |  |  |  |  |  |
Units redeemed value | $ (2,181,000) | $ (1,584,000) | $ (63,343,000) |  |  |  |  |  |
Noncontrolling interest percent | 25.00% | 25.00% |  |  |  |  |  |  |
Common units redemption (in shares) |  |  | 100,000 |  |  |  |  |  |
Common units redemption |  |  | $ 1,600,000 |  |  |  |  |  |
Summary of the activity of the operating partnership units |  |  |  |  |  |  |  |  |
Units outstanding at beginning of year (in shares) | 4,943,000 | 4,375,000 | 8,955,000 |  |  |  |  |  |
Units redeemed for shares of common stock (in shares) | (194,000) | (137,000) | (4,245,000) |  |  |  |  |  |
Units redeemed for cash of $5,856 in 2015 (in shares) | 0 | 0 | (345,000) |  |  |  |  |  |
Units outstanding at end of year (in shares) | 4,790,000 | 4,943,000 | 4,375,000 |  |  |  |  |  |
Units convertible/redeemable at end of year (in shares) | 4,028,000 | 4,083,000 | 3,967,000 |  |  |  |  |  |
Long Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Vesting period | 3 years |  |  |  |  |  |  |  |
Units issued (in shares) | 1,100,000 |  |  |  |  |  |  |  |
Units which not have reached full economic parity with common units (in shares) |  |  |  | 6,000 | 141,000 |  |  | 6,000 | 3,000
Unamortized cost | $ 1,100,000 |  |  |  |  |  |  |  |
Unamortized cost, period of recognition | 2 years 3 months 18 days |  |  |  |  |  |  |  |
Units redeemed value |  |  | $ 5,856,000 |  |  |  |  |  |
Summary of the activity of the operating partnership units |  |  |  |  |  |  |  |  |
Units issued (in shares) | 149,000 | 4,000 | 10,000 |  |  |  |  |  |
Long Term Incentive Plan Units [Member] | Advisory Services Fee [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Allocated compensation expense | $ 405,000 | $ 1,400,000 | $ 1,300,000 |  |  |  |  |  |
Long Term Incentive Plan Units [Member] | Corporate General and Administrative Expense [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Allocated compensation expense | $ 64,000 | $ 44,000 | $ 101,000 |  |  |  |  |  |
Performance Long Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Outstanding (in shares) | 593,000 |  |  |  |  |  |  |  |
Forfeited (in shares) | 389,000 | 0 | 0 |  |  |  |  |  |
Units which not have reached full economic parity with common units (in shares) |  |  |  |  | 281,000 | 312,000 |  |  |
Unamortized cost | $ 799,000 |  |  |  |  |  |  |  |
Unamortized cost, period of recognition | 2 years |  |  |  |  |  |  |  |
Summary of the activity of the operating partnership units |  |  |  |  |  |  |  |  |
Units issued (in shares) | 281,000 | 701,000 | 0 |  |  |  |  |  |
Forfeited (in shares) | (389,000) | 0 | 0 |  |  |  |  |  |
Performance Long Term Incentive Plan Units [Member] | Advisory Services Fee [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Allocated compensation expense | $ 1,600,000 | $ 975,000 | $ 0 |  |  |  |  |  |
Operating Partnership Units [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redemption/conversion of operating partnership units (in shares) | 194,000 | 137,000 | 345,000 |  |  |  |  |  |
Units redeemed value | $ 1,800,000 | $ 1,900,000 | $ 5,900,000 |  |  |  |  |  |
Ashford Prime OP [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redemption value adjustments | $ 0 | $ 8,900,000 |  |  |  |  |  |  |
Noncontrolling interest percent | 11.43% | 13.90% |  |  |  |  |  |  |
Ashford Hospitality Trust, Inc. [Member] |  |  |  |  |  |  |  |  |
Summary of the activity of the operating partnership units |  |  |  |  |  |  |  |  |
Distribution of shares (in shares) |  |  |  |  |  |  | 4,100,000 |  |
Fair value at redemption |  |  |  |  |  |  | $ 61,700,000 |  |
Interest in operating partnership |  |  |  |  |  |  | 0.00% |  |
Minimum [Member] | Performance Long Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Award performance target | 0.00% |  |  |  |  |  |  |  |
Maximum [Member] | Performance Long Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Award performance target | 200.00% |  |  |  |  |  |  |  |

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