Consolidated Statements of Cash Flows Statement (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income including noncontrolling interests in operating subsidiaries	$ 25,941	$ 42,710
Adjustments to reconcile net income including noncontrolling interests in operating subsidiaries to net cash provided by operating activities:
Depreciation and amortization	8,393	5,608
Non-cash stock compensation	9,891	5,574
Gain on investments	(15)	0
Changes in assets and liabilities:
Accounts receivable	(24,573)	(33,870)
Prepaid expenses and other assets	949	(707)
Accounts payable and accrued expenses	(737)	82
Royalties and contingent legal fees payable	24,290	12,460
Deferred revenues	0	(1,510)
Net cash provided by operating activities	44,139	30,347
Cash flows from investing activities:
Purchases of property and equipment	(172)	(39)
Purchase of available-for-sale investments	(8,427)	0
Sale of available-for-sale investments	60	0
Patent acquisition costs	(2,805)	(3,074)
Net cash used in investing activities	(11,344)	(3,113)
Cash flows from financing activities:
Proceeds from sale of common stock, net of issuance costs	175,232	0
Distributions to noncontrolling interests in operating subsidiary	(2,897)	(2,788)
Contributions from noncontrolling interests in operating subsidiary	877	444
Excess tax benefits from stock-based compensation	1,730	0
Proceeds from exercises of stock options	411	6,801
Net cash provided by (used in) financing activities	175,353	4,457
Increase in cash and cash equivalents	208,148	31,691
Cash and Cash Equivalents, beginning	102,515	51,735
Cash and Cash Equivalents, ending	$ 310,663	$ 83,426