Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income	$ 42,312	$ 31,334	$ 10,978
Non-cash items included in net income:
Depreciation and amortization	4,792	3,951	4,487
Net investment (gains) losses	(372)	495	(113)
Restricted stock units recognized, net	31,110	31,950	46,382
Allowance for doubtful accounts	359	263	1,197
Deferred taxes, net	13,908	(8)	(815)
Loss (gain) on fair value of contingent obligation	0	0	575
Non-cash portion of loss on refinancing	0	0	1,759
Loss (gain) on sales of property and equipment	9	267	0
Changes in operating assets and liabilities:
Tenant incentive reimbursement from landlord	2,193	9,663	0
Fees receivable	29,021	(3,578)	(17,170)
Other receivables and assets	(4,420)	(2,162)	(143)
Payment of contingent obligation due selling unitholders of Cogent	0	0	(5,724)
Compensation payable	6,416	6,412	(30,939)
Accounts payable and accrued expenses	(958)	9,042	1,690
Current income taxes payable	6,314	(3,623)	2,168
Net cash provided by operating activities	130,684	84,006	14,332
Investing activities:
Purchases of investments	0	(2,050)	0
Proceeds from sales of investments	1,190	847	0
Distributions from investments, net	32	81	239
Purchases of property and equipment	(4,770)	(17,015)	(1,648)
Net cash used in investing activities	(3,548)	(18,137)	(1,409)
Financing activities:
Payment of contingent obligation due selling unitholders of Cogent	0	0	(13,144)
Proceeds from secured term loan, net	0	0	48,248
Repayment of secured term loan	(55,000)	(38,750)	(18,125)
Dividends paid	(4,353)	(4,108)	(4,417)
Purchase of treasury stock	(45,121)	(23,257)	(69,439)
Net cash used in financing activities	(104,474)	(66,115)	(56,877)
Effect of exchange rate changes	(741)	(1,026)	1,555
Net increase (decrease) in cash and cash equivalents	21,921	(1,272)	(42,399)
Cash and cash equivalents, beginning of year	112,703	113,975	156,374
Cash and cash equivalents, end of year	134,624	112,703	113,975
Supplemental disclosure of cash flow information:
Cash paid for interest	10,417	14,386	21,511
Cash paid for taxes, net of refunds	$ 1,424	$ 13,515	$ 6,201