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Redeemable Noncontrolling Interests in Operating Partnership (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Apr. 30, 2017 | Oct. 31, 2016 | Jun. 30, 2015 | May 31, 2015 | Mar. 31, 2015
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interests in operating partnership | $ 45,782 |  | $ 45,782 |  | $ 59,544 |  |  |  |  |
Noncontrolling interest in a consolidated entity | 25.00% |  | 25.00% |  | 25.00% |  |  |  |  |
Redemption value adjustment |  |  | $ 8,843 |  |  |  |  |  |  |
Net (income) loss attributable to redeemable noncontrolling interests in operating partnership | $ 360 | $ (1,960) | 958 | $ (1,994) |  |  |  |  |  |
Cash distributions declared | $ 858 | 572 | $ 2,500 | 1,700 |  |  |  |  |  |
Ashford Prime OP [Member] |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Noncontrolling interest in a consolidated entity | 11.72% |  | 11.72% |  | 13.19% |  |  |  |  |
Redemption value adjustment |  |  | $ 0 |  | $ 8,900 |  |  |  |  |
Performance Long Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Units which have not reached full economic parity with the common units (in shares) | 983,000 |  | 983,000 |  |  | 281,000 | 312,000 | 389,000 |  |
Compensation not yet recognized | $ 930 |  | $ 930 |  |  |  |  |  |  |
Period for recognition |  |  | 2 years 3 months 18 days |  |  |  |  |  |  |
Performance Long Term Incentive Plan Units [Member] | Advisory Services Fee |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Equity-based compensation expense | $ 633 | 363 | $ 1,700 | 1,100 |  |  |  |  |  |
Performance Long Term Incentive Plan Units [Member] | Minimum |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Award performance target |  |  | 0.00% |  |  |  |  |  |  |
Performance Long Term Incentive Plan Units [Member] | Maximum |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Award performance target |  |  | 200.00% |  |  |  |  |  |  |
Long Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  | 3 years |  |  |  |  |  |  |
Units which have not reached full economic parity with the common units (in shares) | 6,000 |  | 6,000 |  |  | 141,000 |  |  | 6,000 | 3,000
Compensation not yet recognized | $ 1,100 |  | $ 1,100 |  |  |  |  |  |  |
Period for recognition |  |  | 2 years 7 months 6 days |  |  |  |  |  |  |
Other than options (in shares) | 1,500,000 |  | 1,500,000 |  |  |  |  |  |  |
Long Term Incentive Plan Units [Member] | Advisory Services Fee |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Equity-based compensation expense | $ 108 | 375 | $ 281 | 1,100 |  |  |  |  |  |
Long Term Incentive Plan Units [Member] | Corporate General and Administrative Expense |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Equity-based compensation expense | $ 0 | $ 0 | $ 64 | $ 44 |  |  |  |  |  |
Operating Partnership Units |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |
Common units redeemed (in shares) | 0 |  | 6,000 | 0 |  |  |  |  |  |
Redemption/conversion of operating partnership units | $ 0 |  | $ 82 |  |  |  |  |  |  |

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- Definition Change in noncontrolling interest during the period as a result of a change in the redemption value of redeemable noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 16(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 + Details
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