Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income (loss)	$ 10,978	$ 39,222	$ (26,651)
Non-cash items included in net income (loss):
Depreciation and amortization	4,487	5,175	3,114
Net investment (gains) losses	(113)	210	258
Restricted stock units recognized, net	46,382	37,941	40,597
Allowance for doubtful accounts	1,197	0	0
Deferred taxes, net	(815)	5,435	14,594
Loss (gain) on fair value of contingent obligation	575	4,531	(1,332)
Non-cash portion of loss on refinancing	1,759	0	0
Loss (gain) on sales of property and equipment	0	(777)	0
Changes in operating assets and liabilities:
Fees receivable	(17,170)	2,451	3,896
Other receivables and assets	(143)	(836)	449
Payment of contingent obligation due selling unitholders of Cogent	(5,724)	0	0
Compensation payable	(30,939)	30,313	(11,505)
Accounts payable and accrued expenses	1,690	(9,546)	5,409
Current income taxes payable	2,168	2,175	(13,657)
Net cash provided by operating activities	14,332	116,294	15,172
Investing activities:
Distributions from investments, net	239	149	221
Purchases of property and equipment	(1,648)	(2,124)	(2,555)
Sales of property and equipment	0	1,357	0
Net cash used in investing activities	(1,409)	(618)	(2,334)
Financing activities:
Payment of contingent obligation due selling unitholders of Cogent	(13,144)	0	0
Proceeds from revolving bank loan	0	0	69,355
Repayment of revolving bank loan	0	0	(133,425)
Repayment of bank term loans	0	0	(16,875)
Proceeds from secured term loan, net	48,248	0	339,048
Repayment of secured term loan	(18,125)	(21,875)	0
Proceeds from the issuance of common stock	0	0	20,000
Dividends paid	(4,417)	(5,158)	(47,552)
Purchase of treasury stock	(69,439)	(195,299)	(79,561)
Net cash provided by (used in) financing activities	(56,877)	(222,332)	150,990
Effect of exchange rate changes	1,555	(4,616)	5,505
Net increase (decrease) in cash and cash equivalents	(42,399)	(111,272)	169,333
Cash and cash equivalents, beginning of year	156,374	267,646	98,313
Cash and cash equivalents, end of year	113,975	156,374	267,646
Supplemental disclosure of cash flow information:
Cash paid for interest	21,511	20,945	6,567
Cash paid for taxes, net of refunds	$ 6,201	$ 10,299	$ 26,026