Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income (loss) attributable to Acacia Research Corporation	$ 24,421	$ (5,113)
Other comprehensive income (loss):
Unrealized gain (loss) on short-term investments, net of tax of $0	(476)	1,697
Reclassification adjustment for (gains) losses included in net income	447	(848)
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	(24,450)	5,962
Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest	0	0
Comprehensive income (loss) attributable to Acacia Research Corporation	$ (24,450)	$ 5,962