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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | 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, 2010 | $ 113,853 | $ 36 | $ 0 | $ 197,026 | $ 0 | $ (86,191) | $ 2,982
Common stock, shares outstanding at Dec. 31, 2010 |  | 36,029,068 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) attributable to Acacia Research Corporation | 21,106 |  |  |  |  | 21,106 |
Sale of common stock, shares |  | 5,750,000 |  |  |  |  |
Sale of common stock, value |  | 6 |  | 175,223 |  |  |
Payments for Repurchase of Common Stock | 0 |  |  |  |  |  |
Stock options exercised, shares |  | 87,068 |  |  |  |  |
Stock options exercised, value | 411 | 0 |  | 411 |  |  |
Stock issued during period, shares, share-based compensation, net of forfeitures |  | 1,061,865 |  |  |  |  |
Compensation expense related to stock options and restricted stock awards | 13,579 | 1 |  | 13,578 |  |  |
Excess tax benefits from stock-based compensation | 583 |  |  | 583 |  |  |
Net income (loss) attributable to noncontrolling interest | 539 |  |  |  |  |  | 539
Contributions from noncontrolling interests in operating subsidiary, net | 1,539 |  |  |  |  |  | 1,539
Distributions to noncontrolling interests in operating subsidiary | (2,897) |  |  |  |  |  | (2,897)
Adjustments to Additional Paid in Capital, Other |  |  |  | 0 |  |  |
Unrealized gain on foreign currency translation | 0 |  |  |  |  |  |
Unrealized gain (loss) on short-term investments | (1,830) |  |  |  |  |  |
Balance at Dec. 31, 2011 | 322,112 | 43 | 0 | 386,821 | (1,830) | (65,085) | 2,163
Common stock, shares outstanding at Dec. 31, 2011 |  | 42,928,001 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) attributable to Acacia Research Corporation | 59,453 |  |  |  |  | 59,453 |
Sale of common stock, value |  | 6 |  | 218,955 |  |  |
Treasury stock, shares acquired | 1,129,408 | (1,129,408) |  |  |  |  |
Stock Repurchased During Period, Shares | (1,000) |  |  |  |  |  |
Treasury stock, cost of shares acquired | (26,732) |  | (26,731) |  |  |  |
Payments for Repurchase of Common Stock | 26,732 |  |  |  |  |  |
Stock options exercised, shares |  | 71,272 |  |  |  |  |
Stock options exercised, value | 340 |  |  | 340 |  |  |
Stock issued during period, shares, share-based compensation, net of forfeitures |  | 1,168,530 |  |  |  |  |
Compensation expense related to stock options and restricted stock awards | 25,657 | 1 |  | 25,656 |  |  |
Excess tax benefits from stock-based compensation | 13,210 |  |  | 13,210 |  |  |
Net income (loss) attributable to noncontrolling interest | (164) |  |  |  |  |  | (164)
Contributions from noncontrolling interests in operating subsidiary, net | 5,793 |  |  |  |  |  | 5,793
Distributions to noncontrolling interests in operating subsidiary | (816) |  |  |  |  |  | (816)
Unrealized gain on foreign currency translation | 7 |  |  |  |  |  |
Unrealized gain (loss) on short-term investments | 657 |  |  |  |  |  |
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 | 49,160,844 |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) attributable to Acacia Research Corporation | (56,434) |  |  |  |  |  |
Sale of common stock, value | (18,633) | 0 |  | (18,633) |  |  |
Treasury stock, shares acquired | 600,000 | (600,000) |  |  |  |  |
Stock Repurchased During Period, Shares | (1,000) | (666) |  |  |  |  |
Treasury stock, cost of shares acquired | (7,910) |  | (7,909) |  |  |  |
Payments for Repurchase of Common Stock | 7,926 |  |  | (16) |  |  |
Stock options exercised, shares | 115,000 | 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) |  |  |  |  |  |
Net income (loss) attributable to noncontrolling interest | (2,408) |  |  |  |  |  | (2,408)
Contributions from noncontrolling interests in operating subsidiary, net | 1,920 |  |  |  |  |  | 1,920
Unrealized Gain (Loss) on Investments | 219 |  |  |  | 219 |  |
Unrealized gain on foreign currency translation | 0 |  |  |  |  |  |
Unrealized gain (loss) on short-term investments | 26 |  |  |  |  |  |
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 | 49,385,057 |  |  |  |  |

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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -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 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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