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v3.19.3.a.u2

Equity (Details) |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 13, 2020 $ / shares | Jan. 31, 2020 $ / shares | Oct. 30, 2019 $ / shares | Jul. 31, 2019 $ / shares | May 01, 2019 $ / shares | Feb. 13, 2019 $ / shares | Feb. 01, 2019 $ / shares | Feb. 29, 2020 shares | Dec. 31, 2019 USD ($) Vote $ / shares shares | Jul. 31, 2019 USD ($) shares | May 31, 2019 USD ($) $ / shares shares | Jan. 31, 2019 USD ($) shares | Dec. 31, 2018 $ / shares | Dec. 31, 2019 USD ($) Vote $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares | Dec. 31, 2017 USD ($) shares | Dec. 31, 2016 shares | Feb. 07, 2020 shares | Aug. 31, 2019 shares
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued in connection with exchange of convertible debt notes (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,700,000 |  |  |  |  |
Proceeds from issuance of shares under public offering | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 260,383,000 | $ 156,417,000 | $ 76,225,000 |  |  |
Payment to internalize the management team and terminate the existing management agreement using the proceed from public offering | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 25,000,000 |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.01 |  |  |  | $ 0.01 | $ 0.01 | $ 0.01 |  |  |  |
OP Units redeemed by cash | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,674,000) | $ (6,845,000) |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of dividend paid to common stock and preferred stock shareholders represented ordinary income to our stockholders |  |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00% |  |  |
Chief executive officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63,584 |  |  |  |
Restricted common stock | Certain employees of ours |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  | 124,069 |  |  |  | 333,884 | 265,444 | 299,750 |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  | $ 2,300,000 | $ 2,400,000 |  |  |
Restricted common stock | Chief executive officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  | 58,738 |  | 74,830 |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700,000 | $ 600,000 | $ 600,000 |  |  |
Restricted common stock | Employees of the company and a related party |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% |  |  |  |  |
Restricted common stock | Employees of the company and a related party | March, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.00% |  |  |  |  |
Restricted common stock | Employees of the company and a related party | Certain employees of ours |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,200,000 |  |  |  |  |
Restricted common stock | Employees of the company and a related party | ACM / Our "Former Manager" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,379,615 | 1,033,616 |  |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,800,000 | $ 9,500,000 |  |  |  |
Unrecognized compensation cost | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,000,000 |  |  |  |  |
Remaining weighted-average vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 year 9 months 18 days |  |  |  |  |
Restricted stock with grant date fair value (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 900,092 |  |  |  |  |
Restricted stock with grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 5,900,000 |  |  |  |  |
Restricted common stock | Non-employees | Selling and administrative expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000 | 600,000 | 1,700,000 |  |  |
Restricted common stock | Employees | Employee compensation and benefits |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8,800,000 | $ 5,400,000 | $ 3,200,000 |  |  |
Performance-based restricted stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  | 445,765 |  |  |  |  |
Net settlement on vesting of restricted stock (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 203,492 |  |  |  |  |
Performance-based restricted stock | Chief executive officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  | 421,348 |  |  |  |  |
Vesting period (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 years | 4 years | 4 years |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,700,000 | $ 800,000 | $ 1,000,000 |  |  |
Restricted stock units eligible to receive annually | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,050,023 |  |  |  |  |
Performance-based restricted stock | Chief executive officer | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted of restricted stock units that vest at the end of four-year performance period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 352,427 | 381,503 | 448,980 |  |  |
8.25% Series A preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return on the preferred shares issued to third parties by its subsidiary REIT (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.25% | 8.25% | 8.25% |  |  |
7.75% Series B preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return on the preferred shares issued to third parties by its subsidiary REIT (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.75% | 7.75% | 7.75% |  |  |
8.50% Series C preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return on the preferred shares issued to third parties by its subsidiary REIT (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 8.50% | 8.50% | 8.50% |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 19,837,000 | 15,152,700 | 9,500,000 |  |  |
Number of shares purchased |  |  |  |  |  |  |  |  |  |  |  |  |  | 920,000 | 870,000 |  |  |  |
Value of common stock available under shelf registration statement | $ |  |  |  |  |  |  |  |  | $ 137,900,000 |  |  |  |  | $ 137,900,000 |  |  |  |  |
Aggregate amount of debt securities, common stock, preferred stock, depositary shares and warrants filed under shelf registration statement | $ |  |  |  |  |  |  |  |  | $ 500,000,000 |  |  |  |  | $ 500,000,000 |  |  |  |  |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared (in dollars per share) | $ / shares | $ 0.30 |  | $ 0.30 | $ 0.29 | $ 0.28 | $ 0.27 |  |  |  |  |  |  | 0.15 |  |  |  |  |  |
Dividend declared in cash | $ |  |  |  |  |  |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |
Dividend declared in shares |  |  |  |  |  |  |  |  |  |  |  | 901,432 |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net settlement on vesting of restricted stock (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | (58,070) |  |  |  |  |
Tax Treatment for Dividends Paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total dividends paid | $ |  |  |  |  |  |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |
Common Stock | Chief executive officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares purchased |  |  |  |  |  |  |  | 747,500 |  |  |  |  |  |  |  |  |  |  |
Common Stock | Non-management members of the Board of Directors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 67,002 | 74,375 |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 700,000 | $ 600,000 | $ 600,000 |  |  |
Common Stock | Non-management members of the Board of Directors |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of fully vested shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  | 55,244 |  |  |  |  |
Preferred Stock | 8.25% Series A preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared on redeemable preferred stock (in dollars per share) | $ / shares |  | $ 0.515625 | 0.515625 | 0.515625 | 0.515625 | 0.515625 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return on the preferred shares issued to third parties by its subsidiary REIT (as a percent) |  | 8.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock | 7.75% Series B preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared on redeemable preferred stock (in dollars per share) | $ / shares |  |  | 0.484375 | 0.484375 | 0.484375 | 0.484375 | $ 0.484375 |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return on the preferred shares issued to third parties by its subsidiary REIT (as a percent) |  | 7.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock | 8.50% Series C preferred stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared on redeemable preferred stock (in dollars per share) | $ / shares |  | $ 0.53125 | $ 0.53125 | $ 0.53125 | $ 0.53125 | $ 0.53125 |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Return on the preferred shares issued to third parties by its subsidiary REIT (as a percent) |  | 8.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Partnership Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration in stock to be paid with operating partnership units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 391,156 | 577,185 |  |  |  |
Number of vote per share of Special Voting Preferred Shares | Vote |  |  |  |  |  |  |  |  | 1 |  |  |  |  | 1 |  |  |  |  |
OP Units redeemed by cash | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,700,000 | $ 6,800,000 |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 258,677 |  |  |  |  |
Conversion ratio for operating partnership units to common stock shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |  |
Distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividend declared (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.15 |  |  |  |  |  |
Dividend declared in cash | $ |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |
Dividend declared in shares |  |  |  |  |  |  |  |  |  |  |  | 221,666 |  |  |  |  |  |  |
Tax Treatment for Dividends Paid |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total dividends paid | $ |  |  |  |  |  |  |  |  |  |  |  | $ 600,000 |  |  |  |  |  |  |
Operating Partnership Units | Special voting preferred shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
OP units outstanding (in shares) |  |  |  |  |  |  |  |  | 20,484,094 |  |  |  |  | 20,484,094 |  |  |  |  |
Voting power of outstanding stock (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.70% |  |  |  |  |
5.375% Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  | 5.375% |  |  |  | 5.375% | 5.375% | 5.375% |  |  |  |
6.50% Convertible Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  | 6.50% |  | 6.50% |  |  |  |
ACM Acquisition | ACM / Our "Former Manager" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration in stock to be paid with operating partnership units (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,685,729 |  |  |  |  |
Number of preferred stock shares paired with each OP units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  |
ACM Acquisition | Performance-based restricted stock | Chief executive officer |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted of restricted stock units that vest at the end of four-year performance period (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 246,508 | 294,985 | 357,569 |  |  |
Vesting period (in years) |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |  |
Total grant date fair value | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 | $ 3,400,000 | $ 2,700,000 |  |  |
ACM Acquisition | Operating Partnership Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of operating partnership units issues as consideration | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.01 |  |  |  |  |
Public offering | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold (in shares) |  |  |  |  |  |  |  |  | 7,475,000 |  | 9,200,000 |  |  |  |  |  |  |  |
Issued price per share (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 13.93 |  | $ 12.58 |  |  | $ 13.93 |  |  |  |  |
Proceeds from issuance of shares under public offering | $ |  |  |  |  |  |  |  |  | $ 104,000,000 |  | $ 115,600,000 |  |  |  |  |  |  |  |
At-The-Market | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,162,000 |  |  |  |  |
Proceeds from issuance of shares under public offering | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 41,000,000 |  |  |  |  |
Number of shares available under an "At-The-Market" equity offering with JMP Securities LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 | 7,500,000
Over-Allotment Option | Common Stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock sold (in shares) |  |  |  |  |  |  |  |  |  |  | 1,200,000 |  |  | 975,000 |  |  |  |  |

X
- Definition Numbers of operating partnership units issued or issuable in consideration for the business combination. + References No definition available. + Details
Name: | abr_BusinessCombinationConsiderationStockOperatingPartnerUnits
Namespace Prefix: | abr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of operating partnership units issued or issuable in consideration for the business combination. + References No definition available. + Details
Name: | abr_BusinessCombinationConsiderationValueOfStockOperatingPartnershipUnits
Namespace Prefix: | abr_
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