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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Deficit [Member] | Noncontrolling Interests [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2012 | $ 618,478 | $ 49 | $ (26,731) | $ 644,982 | $ (1,166) | $ (5,632) | $ 6,976
Common stock, shares outstanding at Dec. 31, 2012 |  | 49,160,844 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) attributable to Acacia Research Corporation | (56,434) |  |  |  |  | (56,434) |
Payments of Dividends | (18,633) |  |  | (18,633) |  |  |
Stock Issued During Period, Value, New Issues | (18,633) |  |  |  |  |  |
Treasury stock, shares acquired |  | (600,000) |  |  |  |  |
Stock Repurchased During Period, Shares |  | (666) |  |  |  |  |
Treasury stock, cost of shares acquired | (7,910) |  | (7,909) |  |  |  |
payments to repurchase restricted common stock | (16) |  |  | (16) |  |  |
Stock options exercised, shares |  | 115,346 |  |  |  |  |
Stock options exercised, value | 486 |  |  | 486 |  |  |
Stock issued during period, shares, share-based compensation, net of forfeitures |  | 709,533 |  |  |  |  |
Compensation expense related to stock options and restricted stock awards | 27,894 | $ 1 |  | 27,893 |  |  |
Excess tax benefits from stock-based compensation | (1,398) |  |  | (1,398) |  |  |
Net (income) loss attributable to noncontrolling interests in operating subsidiaries | (2,408) |  |  |  |  |  | (2,408)
Contributions from noncontrolling interests in operating subsidiary, net | 1,920 |  |  |  |  |  | 1,920
Unrealized Gain (Loss) on Investments | 219 |  |  |  | 219 |  |
Balance at Dec. 31, 2013 | 562,198 | $ 49 | (34,640) | 653,314 | (947) | (62,066) | 6,488
Common stock, shares outstanding at Dec. 31, 2013 |  | 49,385,057 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) attributable to Acacia Research Corporation | (66,029) |  |  |  |  | (66,029) |
Payments of Dividends | (25,039) |  |  | (25,039) |  |  |
Stock Issued During Period, Value, New Issues | (25,039) |  |  |  |  |  |
Stock options exercised, shares |  | 44,506 |  |  |  |  |
Stock options exercised, value | 206 |  |  | 206 |  |  |
Stock issued during period, shares, share-based compensation, net of forfeitures |  | 635,819 |  |  |  |  |
Compensation expense related to stock options and restricted stock awards | 18,115 | $ 1 |  | 18,114 |  |  |
Excess tax benefits from stock-based compensation | 0 |  |  |  |  |  |
Net (income) loss attributable to noncontrolling interests in operating subsidiaries | (633) |  |  |  |  |  | (633)
Foreign Currency Transaction Gain (Loss), Unrealized | (99) |  |  |  | (99) |  |
Unrealized Gain (Loss) on Investments | 693 |  |  |  | 693 |  |
Distributions to noncontrolling interests in operating subsidiary | 364 |  |  |  |  |  | 364
Balance at Dec. 31, 2014 | $ 489,048 | $ 50 | (34,640) | 646,595 | (353) | (128,095) | 5,491
Common stock, shares outstanding at Dec. 31, 2014 | 50,065,382 | 50,065,382 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) attributable to Acacia Research Corporation | $ (160,036) |  |  |  |  | (160,036) |
Payments of Dividends | $ (25,434) |  |  | (25,434) |  |  |
Stock options exercised, shares | 135,000 | 135,000 |  |  |  |  |
Stock options exercised, value | $ 938 |  |  | 938 |  |  |
Stock issued during period, shares, share-based compensation, net of forfeitures |  | 450,857 |  |  |  |  |
Compensation expense related to stock options and restricted stock awards | 11,048 | $ 1 |  | 11,047 |  |  |
Excess tax benefits from stock-based compensation | 0 |  |  |  |  |  |
Net (income) loss attributable to noncontrolling interests in operating subsidiaries | 2,558 |  |  |  |  |  | 2,558
Foreign Currency Transaction Gain (Loss), Unrealized | (123) |  |  |  | (123) |  |
Unrealized Gain (Loss) on Investments | 261 |  |  |  | 261 |  |
Distributions to noncontrolling interests in operating subsidiary | 4,105 |  |  |  |  |  | 4,105
Balance at Dec. 31, 2015 | $ 314,155 | $ 51 | $ (34,640) | $ 633,146 | $ (215) | $ (288,131) | $ 3,944
Common stock, shares outstanding at Dec. 31, 2015 | 50,651,239 | 50,651,239 |  |  |  |  |

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